Photographica. The Photographica Collector's Price Guide by George Gilbert.

Hawthorn, 1977. Wraps, not issued in hard cover. Crease on lower right of front cover, otherwise fine. Chapters on photographic images, box cameras, folding cameras, single-lens reflex cameras, twin-lens reflex cameras, detective cameras, 35-mm cameras, Novelty TV and hidden cameras, stereo cameras and equipment, motion picture equipment, other photographic collectibles (daguerreian jewelry, exposure meters, Stanhopes, et al.), with appendices.  126 pages.  Prices of course are out of date but otherwise a useful reference.  Companion to Gilbert’s book, Collecting Photographica.