<em>Comet Photo AG: Expo 1964 in Lausanne, 1964 (Com_C12-229-006, <a href="http://doi.org/10.3932/ethz-a-000654426">http://doi.org/10.3932/ethz-a-000654426</a>)
<em>Comet Photo AG: Expo 1964 in Lausanne, 1964 (Com_C12-229-006, <a href="http://doi.org/10.3932/ethz-a-000654426">http://doi.org/10.3932/ethz-a-000654426</a>)
