She painted, collaborated with Andy Warhol on illustrations for the now defunct Bonwit Teller department store, and, under the tutelage of Milton Avery, developed her talent for making monotype prints — some of which were presented at the Iran Pavilion during the 1958 Venice Biennale.
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Her portraiture included many well-known artists and writers of the 1930s and '40s, including Milton Avery, Morris Kantor, Wharton Esherick, Mark Rothko and W. Eugene Smith.
In the New York City Division he worked with many other artists including Jackson Pollock, Lee Krasner, Burgoyne Diller, Byron Browne, Milton Avery, and Stuart Davis.
The 1953 Annual Exhibition of Contemporary American Painting at the Whitney Museum included Ralph's work, along with the work of Milton Avery, /Ralston Crawford, Willem de Kooning, Adolph Gottlieb, Philip Guston, Georgia O'Keeffe, and Jackson Pollock.