Primary Reference Sources:

"National Audubon Society Field Guide to North American Mushrooms" by Gary H. Lincoff

"Mushrooms of West Virginia and the Central Appalachians" by William C. Roody

Fungi Images on the Net

Tom Volk's Fungi (University of Wisconsin)

Mushroom Expert

I'd like to give a special "THANKS!!!!" to Joseph Lankalis of PA who identified the majority of the species found here.