<em>Sonderegger, Christof: Westberlin, Mauer, 09/1976 (Com_L24-0484-0001-0012, <a href="http://doi.org/10.3932/ethz-a-001026104">http://doi.org/10.3932/ethz-a-001026104</a>)
<em>Sonderegger, Christof: Westberlin, Mauer, 09/1976 (Com_L24-0484-0001-0012, <a href="http://doi.org/10.3932/ethz-a-001026104">http://doi.org/10.3932/ethz-a-001026104</a>)
