Add cross-reference to the collections docs.
diff --git a/Doc/library/queue.rst b/Doc/library/queue.rst
index acd953d..e127af2 100644
--- a/Doc/library/queue.rst
+++ b/Doc/library/queue.rst
@@ -61,6 +61,12 @@
Exception raised when non-blocking :meth:`put` (or :meth:`put_nowait`) is called
on a :class:`Queue` object which is full.
+.. seealso::
+
+ :class:`collections.deque` is an alternative implementation of unbounded
+ queues with fast atomic :func:`append` and :func:`popleft` operations that
+ do not require locking.
+
.. _queueobjects: