Provide links to Python source in a handful of
cases where the source is a generally helpful
adjunct to the docs.
diff --git a/Doc/library/collections.rst b/Doc/library/collections.rst
index 7f98c59..6433cd2 100644
--- a/Doc/library/collections.rst
+++ b/Doc/library/collections.rst
@@ -44,6 +44,10 @@
 provides a particular interface, for example, whether it is hashable or
 a mapping.
 
+.. seealso::
+
+   Latest version of the `collections module Python source code
+   <http://svn.python.org/view/python/branches/release27-maint/Lib/collections.py?view=markup>`_
 
 :class:`Counter` objects
 ------------------------
@@ -970,6 +974,9 @@
 
 .. seealso::
 
+   * Latest version of the `Python source code for the collections abstract base classes
+     <http://svn.python.org/view/python/branches/release27-maint/Lib/_abcoll.py?view=markup>`_
+
    * `OrderedSet recipe <http://code.activestate.com/recipes/576694/>`_ for an
      example built on :class:`MutableSet`.