Links for dm.zopepatches.zclasses
dm.zopepatches.zclasses-0.1.1.tar.gz
dm.zopepatches.zclasses-0.1.tar.gz
http://www.plope.com/Books/2_7Edition/CustomZopeObjects.stx
http://www.plope.com/Books/2_7Edition/CustomZopeObjects.stx