In bibliography use hanging indents and et. al.  only after 21 authors

Change-Id: I0bb4f48e3f843d4db166aa8b8862c4fc5dc89b93
diff --git a/styles/ICLC-10.csl b/styles/ICLC-10.csl
index ea36de8..6405427 100644
--- a/styles/ICLC-10.csl
+++ b/styles/ICLC-10.csl
@@ -282,7 +282,7 @@
       </group>
     </layout>
   </citation>
-  <bibliography et-al-min="4" et-al-use-first="1">
+  <bibliography hanging-indent="true" et-al-min="21" et-al-use-first="19" et-al-use-last="true" entry-spacing="0" line-spacing="1">
     <sort>
       <key macro="author"/>
       <key macro="year-date"/>