diff --git a/.DS_Store b/.DS_Store
index 6cd2946..8ffab77 100644
Binary files a/.DS_Store and b/.DS_Store differ
diff --git a/index.html b/index.html
index a035df2..7b38ed3 100644
--- a/index.html
+++ b/index.html
@@ -3,6 +3,16 @@
 <!--Converted with LaTeX2HTML 2019.2 (Released June 5, 2019) -->
 <HTML lang="EN">
 <HEAD>
+<!-- Global site tag (gtag.js) - Google Analytics -->
+<script async src="https://www.googletagmanager.com/gtag/js?id=UA-157531816-1"></script>
+<script>
+  window.dataLayer = window.dataLayer || [];
+  function gtag(){dataLayer.push(arguments);}
+  gtag('js', new Date());
+
+  gtag('config', 'UA-157531816-1');
+</script>
+
 <TITLE>Introduction to Energy Geomechanics</TITLE>
 <META NAME="description" CONTENT="Introduction to Energy Geomechanics">
 <META NAME="keywords" CONTENT="IPG">
@@ -50,7 +60,9 @@ <H1 class="CENTER">Introduction to Energy Geomechanics</H1>
 <BR><a href="mailto:espinoza@austin.utexas.edu">espinoza@austin.utexas.edu</a>
 </P>
 <BR><P class="CENTER"><B>Date:</B> August 21, 2023</P>
-
+<center>
+<a rel="license" href="http://creativecommons.org/licenses/by-nc-nd/4.0/"><img alt="Creative Commons License" style="border-width:0" src="https://i.creativecommons.org/l/by-nc-nd/4.0/88x31.png" /></a><br />This work is licensed under a <a rel="license" href="http://creativecommons.org/licenses/by-nc-nd/4.0/">Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License</a>.
+</center>
 <HR>
 
 <BR><HR>
