Exhibition catalogue published in conjunction with show held September 12 - November 15, 1970. Introduction by J.L. Locher. Texts by Peter Struycken, J. C. J. van der Heyden, R. H. Fuchs, and W.A.L. Beeren. Artists include R. de Bruyn Ouboter, Wouter van Heusden, M.C. Escher, Melle Oldeboerrigter, Cas Oorthuys, J.J. Schoonhoven, Constant A. Nieuwenhuys, Co Westerik, Gerard Fieret, Anton Heyboer, Gerrit Veenhuizen, Jan Snoeck, Carel Visser, D. Raaijmakers, Peter Martens, Dick Cassée, Sipke Huismans, Peter Blokhuis, Pieter Engels, Jan Maaskant, Peter Struycken, and J.C.J. van der Heyden. Includes black-and white-illustrations, biographies of the artists, and a photographic portrait of each man.