We have a nearly all-published set of this influential Belgian magazine, lacking only issue number 3. Here is an incomplete index of contributors from 1953-1980, followed by their issue numbers: 
 Walter Conrad Arensberg 125, 133  
 Jean Arp 6 
 Enrico Baj 4/5 
 Roland Barthes 13 
 Samuel Beckett 13 
 Jorge Luis Borges 9 
 Marcel Broodthaers 2, 7/8, 9, 15/16, 51, 62, 68 
 William Burroughs 63 
 Michel Butor 63 
 John Cage 15/16 
 Paul Colinet 31, 78, 99, 158, and many others 
 Gregory Corso 63 
 e. e. cummings 15/16 
 Paul Eluard (many) 
 Lawrence Ferlinghetti 51 
 Robert Filliou 50, 118 
 Elsa von Freytag-Loringhoven 125 
 Jean-Luc Goddard 63 
 Raoul Hausmann 10, 65, 68, 78 
 José Ortega y Gasset 26 
 Alan Ginsberg 63 
 Alain Jouffroy 42 
 Marcel LeComte (many) 
 Rene Magritte (many) 
 Marcel et Gabriel Piqueray (many) 
 Ezra Pound 15/16 
 Pierre Puttemans 90 (many) 
 Kenneth Rexroth 125 
 Alain Robbe-Grillet 63 
 Muriel Ruykeyser 15/16 
 Kurt Schwitters 6, 10 
 Louis Scutenaire 31, 73, 78, 100 
 Wallace Stevens 15/16 
 Karlheinz Stockhausen 15/16 
 Walter Swennen 51 
 Tristan Tzara 125 
 Miguel de Unamuno 15/16
 Serge Vandercam 43 
 Freddy de Vree (many) 
 Paul de Vree (many) 
 Robert Willems 31, 158

Brussels: Phantomas, 1953–1980. French, Flemish, German, English. Profusely illustrated.