R Bell, J Whitmore, and James Sweeny. 1994 update. PB 245 pages + 43 plates.  ISBN 0951325736

Rarity ratings and a scale given so that prices may be estimated.  The latest research from the experts at the time.

This edition now out of print. 

A complete set of inside pages and plates, loose, and lacking cover.  As new.

If you are looking for the very latest research (2013) in this field, see no. 6524, The Token Book 2.