Three Rolleiflex and Retina user manuals by Dr. Heering and Dr. Croy
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MANUAL. Collection of 3 user manuals:
1) Dr. Walther HEERING: Das Rolleiflex-Buch, 1934
2) Dr. Walther HEERING: Das Rolleiflex-Buch, 1958
3) Dr. Otto CROY: Das Retina-Buch, 1952
Automatically translated by DeepL. The original version is the only legally valid version. To see the original version, switch to the French language.
