The ideal reference books for determining value and identification of collectable glassware. The titles are as follows:
Fire King Information and Price Guide
Depression Glass
Kitchen Glassware of the Depression Years
Collectable Glassware of the 40's, 50's and 60's.
Anchor Hocking Fire King Identification and Value Guide
Fenton Art Glass
Fire King Glassware.
These books sold for roughly $30 each when I bought them. They are probably much more now. A great deal for the serious collector or dealer at at a low price.