1996 by David L. Wilson
Good research info on "collectables" of the American West
Being almost 30 years old the values are, of course, old. Does help with identification and validity ... also helps point in directions needed to be more accurate. It has been useful in the store (and at some of the online auctions, too). Don't really need it any more. Time to let someone else have the thrill of the hunt!
Just as much fun to just browse. Broad categories.