<em>Ganz & Co. (Zürich): Hölzerne Brücken, 1927-1939, (Dia_026-032, <a href="http://doi.org/10.3932/ethz-a-000054647">http://doi.org/10.3932/ethz-a-000054647</a>)
<em>Ganz & Co. (Zürich): Hölzerne Brücken, 1927-1939, (Dia_026-032, <a href="http://doi.org/10.3932/ethz-a-000054647">http://doi.org/10.3932/ethz-a-000054647</a>)
