Ruggles, Marian G. A Selection of Drawings, Pastels and Watercolors from the Collection of Mr. and Mrs. Lester Francis Avnet. New York Cultural Center, New York, 1970.

Mark Rothko: Works on Paper will ultimately document approximately 2,600 works from public and private collections worldwide. Cataloging is ongoing, and works and information will be added to the site during the coming years.