For a brief, easy-to-read background on the Dada movement and list of suggested readings, this essay on About.com is a good place for the novice to begin learning about the movement.
This page on the-artists.org profiles useful links on the Dada movement, Caberet Voltaire, Dada in the press, and links to individual Dada artists including the Baroness.
This brief overview of Dadaism from the free online encyclopedia, Wikipedia, provides a history and critique of the movement that includes its origins, affect on other art movements, major artists, and links to other useful sites.
"Dada Excites Everything." Thus begins the translation of the Dada Manifesto, signed in Paris, January 12, 1921, which is found on the RALPH (Review of Arts, Literature, Philosophy and the Humanities) web site.
Although no longer updated, this site by John Buell contains a wealth of useful background information, including a definition of Dadaism, chronology of the Dada movement, Dada artist biographies, images, poems and more. Buell became a Dada enthusiast when he went to Germany in 1992-3, and became involved with a drama group that produced a dadaistic "Collage."
This web site, which is designed to provide information on the resources and services of the International Dada Archive at the University of Iowa Libraries, serves as the gateway to the International Online Bibliography of Dada. It also includes links to full text scans of some of the major Dada-era publications in the International Dada Archive special collection.
The essay on this web site by Klaus Martens, dated July 2002, contributes to the "ongoing debate focusing on the life and artistic achievements of the 'Dada Baroness,' Elsa von Freytag-Loringhoven." The author is an expert on the Canadian author Frederick Philip Grove (Felix Paul Greve), one of Baroness's former husbands.
This page on the-artists.org web site mainly profiles books, works and items pertaining to the Baroness that can be found on web sites like Amazon.com, eBay, etc. It also contains a useful biography of the Baroness by Christopher Lane includes a short history of her life and a selection of her writings and bibliography.
The Francis M. Naumann Fine Art Gallery specializes in American Art of the 20th Century, as well as European Art from the Dada and Surrealist periods. The gallery's web site contains a section of photos, paintings and drawings of the Baroness. It also includes a photo of her sculpture "Portrait of Marcel Duchamp."