New York, 10 July 1939 - Institutional correspondence Blanche Mahler's letter to Grace L. McCann Morley
2 May 1939 - Internal institutional documents A draft text for the invitation to the exhibition Picasso's Guernica at the Valentine Gallery, New York
New York, ca. March 1947 - Photograph Ralph Burns, Edwin A. Finckel, George Handy, Neal Hefti, Johnny Richards and Eddie Sauter