Here's an interesting flowchart showing interactions between various books, supplements, et al, put out for Dungeons & Dragons, and how they influenced each other.
http://1.bp.blogspot.com/_wtAHfKyQyJE/STsddNs_BDI/AAAAAAAAAD0/gJhd7fvgFIg/s1600-h/DnD0Eto2Ever2.JPG
source: http://jamesmishler.blogspot.com/2008/12/chartistry-od-to-ad-mark-ii.html