77/ 423 Roth, D. and Hamilton, R. The Rotham Certificates. Cadaqués/ Stuttg., Galeria Cadaqués/ Edition Hansjörg Mayer, (1977), 3 text cards (resp. w. English, German and Spanish text) and 37 (col.) pictures postcards, each 10,5x15 cm., printed in 1000 copies, loose as issued in orig. (sl. soiled) stiff paper envelope. - WITH: Hamilton, R. and/or Roth, D. Collaborations of Ch. Rotham. Ibid., idem, 1977, 1st ed., 127p., (col.) ills., printed in 2000 copies, orig. wr.

= Dobke, Dieter Roth - Books + Multiples, Books L Collaborations, p.221.