Medium: pochoir. Printed in 1952 for the Temoignages pour l'art abstrait portfolio (Witnesses for Abstract Art) and published by Editions d'Art d'Aujourd'hui in an edition of 1500. Size: 9 3/8 x 7 3/4 inches (240 x 195mm). Not signed (the artist's name is printed in text beneath the image).

Medium: serigraph / silkscreen. Printed in 1964 on thin wove paper by Imprimerie Mazarine and published in Paris by Galerie Denise Rene for the rare exhibition catalogue "Hard Edge". This work was attached by the publisher onto a larger support sheet. Richard Mortensen was one of several artists who contributed silkscreens for this project (after their own paintings). Image size: 7 x 7 inches (190 x 190mm). Not signed.