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1 Title by Deutsche gesellschaft für mechanik und optik, Berlin.  

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  1. Special catalogue of the collective exhibition of scientific instruments and appliances exhibited by the Deutsche gesellschaft für mechanik und optik, Berlin.
    By: Deutsche gesellschaft für mechanik und optik, Berlin.
    Publication info: Berlin,Printed by J. Bahlke,1893.
    Contributed by: University of California Libraries (archive.org)
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