Rubber stamp

1.  "Art communication marginale", 1974
     Exhibition catalogue, Kunst und Randkommunikation,
     Kunstlers Stempelmarken, Balland
     Curator: H. Fischer
     pp. 246, 24 x 18 cm.

2.  "Artists' Stamps and Stampa Images", 1974
     Exhibitions catalogue, Centre for Communications and
     the Arts,Simon Fraser University, Burnaby, British Columbia, Canada
     Curator: James Warren Felter
     pp. 40, 28 x 21.5 cm.

3.  Rubber, monthely information bulletin about the use of rubber-stamps
     in the arts:
     a - "Fluxus rubber stamps, Vol. 2, No.3, March 1979
     b - "Artists' Postage stamps and cancellation.... ", Vol.2, No. 8, August 1979
           Editor Aart van Barneveld, Amsterdam
           pp. unnumbered, 23.6 x 16 cm. each