Missing source links.
diff --git a/Doc/library/abc.rst b/Doc/library/abc.rst
index 0302eb5..9fadbd2 100644
--- a/Doc/library/abc.rst
+++ b/Doc/library/abc.rst
@@ -7,6 +7,10 @@
.. sectionauthor:: Georg Brandl
.. much of the content adapted from docstrings
+**Source code:** :source:`Lib/abc.py`
+
+--------------
+
This module provides the infrastructure for defining an :term:`abstract base
class` (ABCs) in Python, as outlined in :pep:`3119`; see the PEP for why this
was added to Python. (See also :pep:`3141` and the :mod:`numbers` module
diff --git a/Doc/library/aifc.rst b/Doc/library/aifc.rst
index 304437d..999bad8 100644
--- a/Doc/library/aifc.rst
+++ b/Doc/library/aifc.rst
@@ -10,6 +10,10 @@
single: AIFF
single: AIFF-C
+**Source code:** :source:`Lib/aifc.py`
+
+--------------
+
This module provides support for reading and writing AIFF and AIFF-C files.
AIFF is Audio Interchange File Format, a format for storing digital audio
samples in a file. AIFF-C is a newer version of the format that includes the
diff --git a/Doc/library/asynchat.rst b/Doc/library/asynchat.rst
index 26d3290..75b3cda 100644
--- a/Doc/library/asynchat.rst
+++ b/Doc/library/asynchat.rst
@@ -6,6 +6,9 @@
.. moduleauthor:: Sam Rushing <rushing@nightmare.com>
.. sectionauthor:: Steve Holden <sholden@holdenweb.com>
+**Source code:** :source:`Lib/asynchat.py`
+
+--------------
This module builds on the :mod:`asyncore` infrastructure, simplifying
asynchronous clients and servers and making it easier to handle protocols
diff --git a/Doc/library/asyncore.rst b/Doc/library/asyncore.rst
index 8e6c243..b168ca7 100644
--- a/Doc/library/asyncore.rst
+++ b/Doc/library/asyncore.rst
@@ -9,6 +9,9 @@
.. sectionauthor:: Steve Holden <sholden@holdenweb.com>
.. heavily adapted from original documentation by Sam Rushing
+**Source code:** :source:`Lib/asyncore.py`
+
+--------------
This module provides the basic infrastructure for writing asynchronous socket
service clients and servers.