The Four Powers

From Author Wars - https://authorwars.com/publications/the-four-powers-518419.html

Overview:

Title: The Four Powers
Author: Hannes Bok
Year: 1945
Publisher: Hannes Bok
Pages: [4]
Binding: other
Type: Non-fiction
Title Reference: The Black Powers
Notes: Lithographs, printed by Paul Dennis O'Connor, sold only as a set.
Nominally 100 copies, plus unknown number of artist's proofs.
O'Connor reported in 1975 (to Victor Dricks, who sold the verifier his copy) that 200 copies were really printed.
B&W, image area 10" x 14", on archival rag paper.