The card depicts a large C. It is stored with Zaj publications since jose luis castillejo was a member of this group. -- Source of annotation: Marvin or Ruth Sackner.

One of the two cards was taken from Sharkey's Scrapbook, a work held by the Sackner Archive. The recto of the card depicts in large font, the number "69." It is stored with Zaj publications since jose luis castillejo was a member of this group. -- Source of annotation: Marvin or Ruth Sackner.

The Zaj group of artists consisted of Hidalgo, Marchetti, Castillejo, and Ferrer. This catalogue includes photographs of pianos modified by Zaj for Archivo Conz. Thirty-two large scale silkscreen prints on cloth published by Conz of Zaj images are depicted. The Sackner Archive holds several of the originals which are often postcard size. -- Source of annotation: Marvin or Ruth Sackner.

One of the two cards was taken from Sharkey's Scrapbook, a work held by the Sackner Archive. Despite the title, the card is printed in black and white in different font sizes and spacings thereby providing color directions. It is stored with Zaj publications since jose luis castillejo was a member of this group. -- Source of annotation: Marvin or Ruth Sackner.

Stored with Zaj material. The card depicts a photograph of Hidalgo taken in Aachen in 1968. -- Source of annotation: Marvin or Ruth Sackner.

Stored with Zaj material. The card depicts a regular grid of periods on a deep blue colored background. -- Source of annotation: Marvin or Ruth Sackner.

All pages throughout the book repetitively repeat the title. -- Source of annotation: Marvin or Ruth Sackner.