<em>Comet Photo AG: Recycling von Telefonbüchern, 1975 (Com_LC1469-001-022, <a href="http://doi.org/10.3932/ethz-a-001035163">http://doi.org/10.3932/ethz-a-001035163</a>)
<em>Comet Photo AG: Recycling von Telefonbüchern, 1975 (Com_LC1469-001-022, <a href="http://doi.org/10.3932/ethz-a-001035163">http://doi.org/10.3932/ethz-a-001035163</a>)
