Archives of American Art - files, ephemera and [non-art] collections of artists, dealers, art historians and art journalist. Much of this collection is loanable through microfilm or online as .pdf's. Separate image search.
Getty Publications free, full-text of back publications Virtual Library.
Duke's Rare Book, Manuscript and Special Collections Library has untold unique resources. Because of the nature of its collections, its riches are not as discernable through the Duke catalog as other material. In addition to doing a search limited to Rubenstein Library, email or query a special collections librarian for a consult on what may be of interest. RUBENSTEIN SEARCH