Flam, Jack D, Carol O. Selle, Charles E. Pierce, and William Griswold. New York Collects: Drawings and Watercolors 1900–1950. Pierpont Morgan Library, New York, 1999.

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.