Leslie Looper's Genealogy Guide for Duke Libraries
WorldCat - technically, Worldcat (OCLC) produces the Archives Grid as well. However, what the Worldcat (cataloging database) and the Archives Grid consider archival material seems to differ. When searching Worldcat (library version, here, required authentication), limit the 'archive material' as well as your name search.
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.
