RIDDER, William de. Paper Fluxwork.

[New York, NY): Reflux, [1990].  First edition.  Printed cards.  7.9cm by 10.8cm.  Fourteen cards printed with, mostly, instructions to help you construct impossible paper works, cut here, folded there, and glue here, having read the final instruction card you are requested to send $5 to do Ridder for having read it.  The cards, all in very good condition, are housed in plastic case with glued title label.