No information given (issued ca. 1956). 8 1/2 x 11 in. Mimeographed. 19 p. (printed on rectos only). Very good. 
"Abirdged Copy of Supplementary Brief Filed with the U.S. Court of Appeals in behalf of Morton Sobell." The attorneys for Sobell included Frank J. Donner, Arthur Kinoy, Marshall Perlin, Benjamin Dreyfus and Luis Sanchez Ponton.