Rolf Eschenburg...,[et al.] Rolf Eschenburg...,[et al. Rolf Froessler...,[et al.] Aeschylus...[et al.] Rolf Froessler...,[et al. Rudolf Arnheim,...[et al.] Hajo Duchting...[et al.] Helmut Ahuis...,[et al.] Peter Gerhard...,[et al.] Rudolf L. Schreiber,...[et al.