- Pl. iii Richard A. Stoner
- Pls. vi, xvi, Fig. 25 Photo © 2001 Whitney Museum of American Art, New York; Geoffrey Clements
- Pl. xi Photo © 2001 The Museum of Modern Art, New York
- Pl. xii Jim Strong, Inc., New York
- Pl. xv All Rights Reserved.
- Figs. 7, 8 Bruce Dunbar
- Fig. 18 Graydon Wood
- Fig. 28 Jim Frank
- Fig. 32 © The Newark Museum; Armen Photographers, 1977
- A. E. Gallatin, "The Plan of the Gallery of Living Art," 1933. © The Estate of A. E. Gallatin, by permission
- Charles G. Shaw, "The Plastic Polygon," 1938. © The Estate of Charles G. Shaw, by permission
- George L. K. Morris, "The American Abstract Artists," 1939. © Frelinghuysen Morris House and Studio, by permission