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Are you Sigismund Blumann, author of the books below?
Photographic workroom handbook by Sigismund Blumann Photographic workroom handbook by Sigismund Blumann Photographic handbook; by Sigismund Blumann Photographic greetings; by Sigismund Blumann Photographic handbook; by Sigismund Blumann Camera Craft by Sigismund Blumann Enlarging Manual by Sigismund Blumann Photographic Handbook [ Inscribed By The Author] by Sigismund Blumann


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