Part of Sam and Ayala Zacks fonds
Correspondence with Seattle Art Museum, William Sandberg, Jonas Salk, Henry Seldis (LA County Museum of Art), Moshe Safdie, Lord Sam Segal, Charlotte Cramer Sachs, Peter Swann, James Sweeney, and others
Part of Sam and Ayala Zacks fonds
Correspondence with Sidney Janis Gallery
Part of Sam and Ayala Zacks fonds
Correspondence with J. Komkommer, Kroller-Muller Museum, Yousuf Karsh, Kitchener-Waterloo Art Gallery, Ann Kennedy (AGO), Knoedler & Co., and William Kilbourn.
Part of Sam and Ayala Zacks fonds
Correspondence with Museo Picasso, Pauline McGibbon, lawyer H.A. Malcolmson, Metropolitan Museum of Art, the Rolland Micheners, Golda Meir, Gallery Moos, and others.
Part of Sam and Ayala Zacks fonds
Correspondence with The Ontario Society of Artists and the O'Keefe Centre.
Part of Sam and Ayala Zacks fonds
Correspondence with Roberts Gallery, Kurt Rowland, John Robarts, Ralph Allen (Agnes Etherington Art Centre), Henry H. Reed (re ICOM Committee), Willis Romanow, ROM, Norman Reid (Tate), and Virginia Rock (York University).
Part of Sam and Ayala Zacks fonds
Correspondence with Henry Trubner (Seattle Art Museum), the Twentieth Century Club, Mashel Teitlebaum, Christian Tomasini, and others
Part of Sam and Ayala Zacks fonds
Correspondence with Radu Varia, UNESCO, Victoria College, and others
Part of Sam and Ayala Zacks fonds
Correspondence with Buckminster Fuller re Beckett Theatre, St. Peter's College, Oxford
Part of Sam and Ayala Zacks fonds
Correspondence re Gerald Gladstone, the Guggenheim, Heim Gamzu (Museum Tel-Aviv), Kate Graham, Peggy Gale (AGO), Sir Philip Hendy, Hart House, Dalzell Hatfield Galleries, etc.