diff --git a/content/book/morrison16_groun_shiel.md b/content/book/morrison16_groun_shiel.md
index 080e438..5f0de51 100644
--- a/content/book/morrison16_groun_shiel.md
+++ b/content/book/morrison16_groun_shiel.md
@@ -9,7 +9,7 @@ Tags
 
 
 Reference
-: ([Morrison 2016](#orgbeadffa))
+: ([Morrison 2016](#orga1f11ed))
 
 Author(s)
 : Morrison, R.
@@ -43,6 +43,13 @@ This displacement current flows when charges are added or removed from the plate
 
 ## Magnetics {#magnetics}
 
+<div class="sum">
+  <div></div>
+
+Summary
+
+</div>
+
 
 ## Digital Electronics {#digital-electronics}
 
@@ -73,4 +80,4 @@ This displacement current flows when charges are added or removed from the plate
 
 ## Bibliography {#bibliography}
 
-<a id="orgbeadffa"></a>Morrison, Ralph. 2016. _Grounding and Shielding: Circuits and Interference_. John Wiley & Sons.
+<a id="orga1f11ed"></a>Morrison, Ralph. 2016. _Grounding and Shielding: Circuits and Interference_. John Wiley & Sons.