link to extensive generator docs in the reference manual

Doc/library/stdtypes.rst

@@ -619,10 +619,18 @@ Implementations that do not obey this property are deemed broken.  (This
 constraint was added in Python 2.3; in Python 2.2, various iterators are broken
 according to this rule.)
 
+
+.. _generator-types:
+
+Generator Types
+---------------
+
 Python's :term:`generator`\s provide a convenient way to implement the iterator
 protocol.  If a container object's :meth:`__iter__` method is implemented as a
 generator, it will automatically return an iterator object (technically, a
-generator object) supplying the :meth:`__iter__` and :meth:`next` methods.
+generator object) supplying the :meth:`__iter__` and :meth:`next` methods.  More
+information about generators can be found in :ref:`the documentation for the
+yield expression <yieldexpr>`.
 
 
 .. _typesseq: