Classic Soda Machines, 3rd Edition by Jeff Walters:

Soda Machine Pricing and Identification Guide-

1) Printed Book: 160 pages in Full Color 

160 pages, full color photos, Coca-Cola, Pepsi, Dr. Pepper, 7-Up, Royal

Crown, Ideal Sliders, and a few Miscellaneous brands. Covers 1920's through

late 1950's. Shows approximate year, dimensions, rarity rating, and

average/fully restored condition pricing.