Nummer [núm. 4]
Eberhard Pragenberg (editor)
Heinz Breloch (editor)
1972
Con colaboraciones de: Matthias Schäffer, Krimhild Becker & Charlotte Kindl, Peter Adamski, Rainer Maul, Antonio Muntadas, Barbara & Michael Leisgen, J. F. Bory, Steffen Missmahl, Géza Perneczky, Matthias Schäffer, Wolfgang Esser, Edmund Kuppel, Peter Valentiner, Klaus Groh, Victoria Bell, Helmut Schweizer, Heinz Breloh, Werner Wenz, Colston Sanger, Andrey Stavenhaegn, Christopher MC Neur & Max Blagg y Peter Pick.
Texto extraído de: <https://www.macba.cat/es/aprendre-investigar/arxiu/nummer-num-4>.