The book cover design entitled, "M. Gorki - Vladimir Lenin," that is depicted in this catalogue, is held by the Sackner Archive. -- Source of annotation: Marvin or Ruth Sackner.

Yve-Alain Bois in his essay "El Lissitzky: Radical Reversibility" includes an analysis and illustration of "Beat the Whites with the Red Wedge." Also illustrated and held by the Sackner Archive are "For the Voice," "Pressa," and "Proun 2C" (the lithograph that has been deaccessioned). -- Source of annotation: Marvin or Ruth Sackner.

Includes reproduction of El Lissitzky's poster, "Beat the Whites with the Red Wedge" as plate No.124. This poster from Lenin-Bibliothek, Moscow is identical to the one held by the Sackner Archive. The poster was viewed by the Sackners at the exhibition held at the Guggenheim Museum October 1992 and the identity confirmed. The reproduction in the catalog fails to show the two black lines surrounding the image. Another poster purported to be an original at Rosa Esman's gallery had a single line. -- Source of annotation: Marvin or Ruth Sackner.