Witt Checklist of Painters ca. 1200-1976, The Courtauld Institute of Art (London, England)Witt Computer Index, The Courtauld Institute of Art (London, England)Getty Research Institute, Research Library, Photo Archive, The Getty Center (Los Angeles, California)Bibliography of the History of Art / Bibliographie d'Histoire de l'Art, The Getty Center (Los Angeles, California)Canadian Centre for Architecture / Centre Canadien d'Architecture (Montreal, Canada)Avery Index to Architectural Periodicals, Columbia University (New York, New York)J. Paul Getty Museum (Los Angeles, California)Getty Provenance Index, The Getty Center (Los Angeles, California)Getty Research Institute, Research Library catalog records, The Getty Center (Los Angeles, California)Getty Vocabulary ProgramGetty Research Institute, Digital Resource Management, The Getty Center (Los Angeles, California)Frick Art Reference Library (New York, New York)Getty Research Institute, Special Collections Cataloging, The Getty Center (Los Angeles, California)Getty Research Institute, Research Library, Technical Services, The Getty Center (Los Angeles, California)Foundation for Documents of Architecture (Washington, DC)Census of Antique Art and Architecture Known to the Renaissance (Berlin, Germany)Getty Conservation Institute, The Getty Center (Los Angeles, California)Formerly used to refer to the GRLPSC (Getty Research Institute, Research Library Photo Study Collection)Bunting Visual Resources Library, University of New Mexico (Albuquerque, New Mexico)Architecture and Allied Arts Library and Digital Scholarship Center, University of Oregon (Eugene, Oregon)Fine Arts Library, Indiana University (Bloomington, Indiana)Fine Arts Collection, Luther College (Decorah, Iowa)National Museum of Women in the Arts (Washington, DC)College of Visual and Performing Arts, University of South Florida (Tampa, Florida)Conway Library, Courtauld Institute of Art, University of London, Somerset House (London, England)Department of the History of Art, University of California, Berkeley (Berkeley, California) Society for Contemporary Arts (Czech Republic)Witt Library, Courtauld Institute of Art (London, England)Georgia O'Keeffe Museum, formerly Georgia O'Keeffe Museum Research Center (Sante Fe, New Mexico)art500 (art500.com)Art and Art History Department, University of Texas at Austin Lane Medical Library, Stanford University (Stanford, California)Istituto Centrale per il Catalogo e la Documentazione (Rome, Italy)Judah L. Magnes Museum (Berkeley, California)Russian Collections, Ltd. (Columbus, Ohio)Johns Hopkins University (Baltimore, Maryland)Milwaukee Art Museum (Milwaukee, Wisconsin)Getty Vocabulary Program, intern editorCollege of Built Environments, University of Washington (Seattle, Washington)Carpenter Library and Visual Resource Center, Bryn Mawr College (Bryn Mawr, Pennsylvania)