<em>Comet Photo AG: Expo 1964 in Lausanne, 1964 (Com_C12-229-020, <a href="http://doi.org/10.3932/ethz-a-000654438">http://doi.org/10.3932/ethz-a-000654438</a>)
<em>Comet Photo AG: Expo 1964 in Lausanne, 1964 (Com_C12-229-020, <a href="http://doi.org/10.3932/ethz-a-000654438">http://doi.org/10.3932/ethz-a-000654438</a>)
