"Identifying Leica Lenses" by Ghester Sartorius, 1999
ASAHI PENTAX SMC Pentax Lenses Manual Guide 08/1979
Leica Lens Book Elmarit Summicron German Leitz M6 Elmar
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NIKON SERIES E 50 mm F/1.8 LENS MANUAL
PENTAX SMC Pentax Lenses Manual Guide 01/1981
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CANON INTERCHANGEABLE FD LENS MANUAL & BONUS
PENTAX Lenses And Accessories Manual Guide 09/1983
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User manual: Nikon Nikkor-P auto 55mm f/3.5 f3.5 #836
YASHICA Yashinon Lenses and Accessories Owner's Manual
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