SIDAC 1979. No. 3/4, Onderzoek: Bevestigingen -Papier/Potlood lijnen.: 21x15cm., booklet fixed with
two metal rivets, title-page, 8 pages with original drawings (pencil), cut outs, collages. Numbered copy 188. Original wrapper, Sema Galerie Haarlem.
Piet Franzen. Onderzoek Projekten (SIDAC).
This copy originally mailed to Other Books and So Archive in Amsterdam.

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