1. Franz Max Osswald, contact print of sound photographs in architectural models, from Osswald's applied acoustics laboratory at ETH Zurich, 1930–33 (Image Archive, ETH Library Zurich,
Franz Max Osswald, contact print of sound photographs in architectural models, from Osswald's applied acoustics laboratory at ETH Zurich, 1930–33 (Image Archive, ETH Library Zurich,
Sabine von Fischer; J Soc Archit Hist 2017;76:3:
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