<em>Comet Photo AG: Richterswil, Osterhasengiessen bei der Confiserie Troxler, 17.03.1988 (Com_LC1205-001-004, <a href="http://doi.org/10.3932/ethz-a-001001028">http://doi.org/10.3932/ethz-a-001001028</a>)