diff --git a/en-us/course02-authoring_concepts/topics/lc_best_practices_intro.dita b/en-us/course02-authoring_concepts/topics/lc_best_practices_intro.dita
index bb1b7d45..debabfd4 100644
--- a/en-us/course02-authoring_concepts/topics/lc_best_practices_intro.dita
+++ b/en-us/course02-authoring_concepts/topics/lc_best_practices_intro.dita
@@ -42,22 +42,16 @@
format="html" scope="external">
DITA Style Guide, Language and punctuation
-
diff --git a/en-us/course04-authoring_gloss_reference/topics/lc_creating_ref.dita b/en-us/course04-authoring_gloss_reference/topics/lc_creating_ref.dita
index e8e0b485..c97769ff 100644
--- a/en-us/course04-authoring_gloss_reference/topics/lc_creating_ref.dita
+++ b/en-us/course04-authoring_gloss_reference/topics/lc_creating_ref.dita
@@ -36,7 +36,7 @@
DITA Style Guide, Reference
diff --git a/en-us/course05-using_dita_maps_and_bookmaps/topics/lc_advanced_ditamaps.dita b/en-us/course05-using_dita_maps_and_bookmaps/topics/lc_advanced_ditamaps.dita
index 11ed5335..f7a6aab9 100644
--- a/en-us/course05-using_dita_maps_and_bookmaps/topics/lc_advanced_ditamaps.dita
+++ b/en-us/course05-using_dita_maps_and_bookmaps/topics/lc_advanced_ditamaps.dita
@@ -33,7 +33,7 @@
DITA Style Guide, Metadata
diff --git a/en-us/course05-using_dita_maps_and_bookmaps/topics/lc_creating_a_bookmap.dita b/en-us/course05-using_dita_maps_and_bookmaps/topics/lc_creating_a_bookmap.dita
index df506dc4..e83a396c 100644
--- a/en-us/course05-using_dita_maps_and_bookmaps/topics/lc_creating_a_bookmap.dita
+++ b/en-us/course05-using_dita_maps_and_bookmaps/topics/lc_creating_a_bookmap.dita
@@ -34,20 +34,19 @@
DITA Style Guide, The bookmap feature
DITA Style Guide, Nesting bookmaps within ditamaps
DITA Style Guide, Sample bookmap file
-
diff --git a/en-us/course05-using_dita_maps_and_bookmaps/topics/lc_creating_a_map.dita b/en-us/course05-using_dita_maps_and_bookmaps/topics/lc_creating_a_map.dita
index 5b058c12..c5432768 100644
--- a/en-us/course05-using_dita_maps_and_bookmaps/topics/lc_creating_a_map.dita
+++ b/en-us/course05-using_dita_maps_and_bookmaps/topics/lc_creating_a_map.dita
@@ -33,17 +33,17 @@
DITA Style Guide, Purpose of ditamap files
DITA Style Guide, DITA map vocabulary
DITA Style Guide, The topicref element
diff --git a/en-us/course05-using_dita_maps_and_bookmaps/topics/lc_reltables.dita b/en-us/course05-using_dita_maps_and_bookmaps/topics/lc_reltables.dita
index 2cbf9c23..5a7bf6a8 100755
--- a/en-us/course05-using_dita_maps_and_bookmaps/topics/lc_reltables.dita
+++ b/en-us/course05-using_dita_maps_and_bookmaps/topics/lc_reltables.dita
@@ -32,7 +32,7 @@
-
DITA Style Guide, Relationship tables
@@ -40,9 +40,10 @@
format="html" scope="external">
Dissecting DITA relationship tables
-
+
diff --git a/en-us/course06-reuse_basic/maps/lc_creating_reusable_topics.dita b/en-us/course06-reuse_basic/maps/lc_creating_reusable_topics.dita
index 45f99a54..82959d83 100644
--- a/en-us/course06-reuse_basic/maps/lc_creating_reusable_topics.dita
+++ b/en-us/course06-reuse_basic/maps/lc_creating_reusable_topics.dita
@@ -33,17 +33,17 @@
DITA Style Guide, Stem sentences, glue text, and other transitional information
DITA Style Guide, Writing for re-use
DITA Style Guide, Re-use guidelines
diff --git a/en-us/course06-reuse_basic/topics/lc_intro_to_reuse.dita b/en-us/course06-reuse_basic/topics/lc_intro_to_reuse.dita
index 07f85e6f..dfae9cef 100644
--- a/en-us/course06-reuse_basic/topics/lc_intro_to_reuse.dita
+++ b/en-us/course06-reuse_basic/topics/lc_intro_to_reuse.dita
@@ -34,12 +34,12 @@
DITA Style Guide, Content re-use definition
DITA Style Guide, Re-use and the DITA Maturity Model
diff --git a/en-us/course06-reuse_basic/topics/lc_maps_and_topics.dita b/en-us/course06-reuse_basic/topics/lc_maps_and_topics.dita
index db8e8108..ffd5579b 100644
--- a/en-us/course06-reuse_basic/topics/lc_maps_and_topics.dita
+++ b/en-us/course06-reuse_basic/topics/lc_maps_and_topics.dita
@@ -33,18 +33,19 @@
+ href="https://www.oxygenxml.com/dita/styleguide/Content_Reuse/c_Embedded_Topics.html"
+ format="html" scope="external">
DITA Style Guide, Embedded topics and ditamaps
-
+
+
+
diff --git a/en-us/course06-reuse_basic/topics/lc_using_conrefs.dita b/en-us/course06-reuse_basic/topics/lc_using_conrefs.dita
index 3ec1cced..e4560e5c 100644
--- a/en-us/course06-reuse_basic/topics/lc_using_conrefs.dita
+++ b/en-us/course06-reuse_basic/topics/lc_using_conrefs.dita
@@ -26,18 +26,19 @@
+ scope="external" format="html">
OASIS DITA Version 1.2 Standard, The conref attribute
+ href="https://www.oxygenxml.com/dita/styleguide/Content_Reuse/c_Content_Reference.html"
+ scope="external" format="html">
DITA Style Guide, The content reference (conref) attribute
-
Using content references in DITA
-
+ -->
diff --git a/en-us/course07-reuse_advanced/topics/lc_advanced_conrefs.dita b/en-us/course07-reuse_advanced/topics/lc_advanced_conrefs.dita
index 2b268776..88fc64a2 100644
--- a/en-us/course07-reuse_advanced/topics/lc_advanced_conrefs.dita
+++ b/en-us/course07-reuse_advanced/topics/lc_advanced_conrefs.dita
@@ -38,12 +38,12 @@
+ scope="external" format="html">
DITA Specification, Complex attribute definitions
+ href="https://www.oxygenxml.com/dita/styleguide/Content_Reuse/c_Advanced_conref_Principles.html"
+ scope="external" format="html">
DITA Style Guide, Advanced conref principles
A simple use case for DITA conkeyrefs
-
-
-
-
diff --git a/en-us/course07-reuse_advanced/topics/lc_using_conditions.dita b/en-us/course07-reuse_advanced/topics/lc_using_conditions.dita
index adb1896d..80ba9fcc 100644
--- a/en-us/course07-reuse_advanced/topics/lc_using_conditions.dita
+++ b/en-us/course07-reuse_advanced/topics/lc_using_conditions.dita
@@ -38,12 +38,12 @@
DITA Style Guide, Conditional processing concepts
DITA Style Guide, Condition (or select) attributes
@@ -54,7 +54,7 @@
- DITA version 1.3 specification, DITAVAL elements
+ OASIS DITA version 1.2 Standard, DITAVAL elements
Conditional content in DITA
diff --git a/en-us/course07-reuse_advanced/topics/lc_using_keys.dita b/en-us/course07-reuse_advanced/topics/lc_using_keys.dita
index 532413b7..3db2dea2 100644
--- a/en-us/course07-reuse_advanced/topics/lc_using_keys.dita
+++ b/en-us/course07-reuse_advanced/topics/lc_using_keys.dita
@@ -46,12 +46,12 @@
DITA Specification, Key-based addressing
DITA Style Guide, Indirect linking with keys
DITA Style Guide, Variables using indirection