Some pages from the catalog
Erratic Art Mail International System at the Egmont Hojskolen
Hou, Denmark, 1979, ca. p. 16 (ed. by Ulises Carrión)

Carrión, Ulises: Mail Art and the Big Monster, in: Erratic ART MAIL International System at the Egmont Højskolen, Hou, Denmark, February 1979