Wikipedia Edit-a-Thon: Where to Find Sources

Scholarly art encyclopedia, updated regularly and covering global art and architecture from prehistory to present day. Includes peer-reviewed articles contributed by nearly 7,000 scholars from around the world, accompanied by images, bibliographies, and links to additional resources.

A comprehensive and definitive resource for artists’ biographies, published since 1911. Includes 149,000 biographies as well as auction records, exhibition histories, and over 11,000 images of artists’ signatures and stamps of sale.

The Archives of American Art is the world’s preeminent and most widely used research center dedicated to collecting, preserving, and providing access to primary sources that document the history of the visual arts in America.

Essays, works of art, and chronologies

From Oxford Art Online. Review significant moments in art history from all over the globe. Timelines feature brief summaries of important events in the visual arts; many of the summaries are accompanied by an image, and all link to articles in Grove Art Online for further reading.

The collection of the NMWA includes works by more than 1,000 nationally and internationally renowned artists. Browse to learn more about featured artists.

An innovative web directory to U.S. archival collections of primary source materials by and about women visual artists active in the U.S. since 1945.

An open directory of female* illustrators

Information on women artists included in the archives of the Schlesinger Library, Harvard University

Tools and support for work and study in art and cultural heritage

This collection contains digitized versions of key selections from the personal libraries of two women who helped shape the mid-century New York art world— Hilla Rebay at the Guggenheim (then the Museum of Non-Objective Painting) and Juliana Force at the Whitney. These items allow for a closer look at the movements, artists, and ideas that influenced the founding directors of two of New York City’s most prominent art museums, the Solomon R. Guggenheim Museum and the Whitney Museum of American Art. Materials include American and European art historical texts, art exhibition catalogs, biographies of artists and collectors, philosophical and political treatises, and New York City guides and tourism pamphlets, and range in date from the late 1800s to the 1960s.

MetPublications is an online portal to The Metropolitan Museum of Art's comprehensive art publishing program. It features over 1700 titles, including books, guides, Bulletins and Journals from the last six decades. The full contents of over 1400 out-of-print titles may be read online, searched, or downloaded as a PDF for free.

Harris, Ann Sutherland, et al. Women Artists, 1550-1950. First ed., Los Angeles County Museum of Art, 1976.

Gaze, Delia, editor. Dictionary of Women Artists. Fitzroy Dearborn, 1997.

Kovinick, Phil, and Marian Yoshiki-Kovinick. An Encyclopedia of Women Artists of the American West. 1st ed., University of Texas Press, 1998.

Heller, Jules, and Nancy Heller, editors. North American Women Artists of the Twentieth Century : A Biographical Dictionary. Garland Publishing, 1995.

At this link, you will find a list of reliable sources identified by Wikipedia for articles on women artists.