1. Ivor Matanle, "Collecting and using Classic SLRs', Thames and Hudson, 1997
Excellent book(!!), which I would highly recommend to anyone interested in the old SLR.

2. Leonard Gaunt, "The praktica way. The praktica photographer's companion", Focal Press, London, 1972.

3. Thomas Tomosy, "Camera Maintenance and Repair", Amherst Media Inc, NY, 1993

4. Bill Hansen and Michael Dierdorff, "Japanese 35mm SLR Cameras. A comprehensive Data Guide", Hove collectors books, England, 1998

5. Rudolph Lea, "The register of 35mm Single Lense Reflex Cameras. Second Edition", Wittig books, Germany, 1993