Detroit Institute of Arts ; Denver Art Museum ; Putnam collection ; Timken Museum of Art ; estate of Hjalmar Hartmann ; Bellagio Gallery of Fine Art ; the late Lore and Rudolph Heinemann ; Wiliam and Bernadette Berger ; estate of Ms. Hertha Katz ; Di Portanova collection ; Mr. and Mrs. Donald Bauchner ; estate of Mrs. C.J. Cheston-Jonkvr. Tjarda van Starkenborgh ; estate of Maurice Austin ; Los Angeles County Museum of Art ; estate of Virginia Carroll Crawford ; Gayfryd and Saul Steinbberg.