Author
Andree, Rolf,
2
Pennsylvania State University. Museum of Art
2
Ricke-Immel, Ute, 1938-
2
Allentown Art Museum
1
DAR Museum (Washington, D.C.)
1
Da Costa Nunes, Jadviga M.
1
Frank S. Schwarz & Son
1
Hansen, Judith W., 1953-
1
Historical Society of Pennsylvania
1
Miller, Lillian B.
1
National Portrait Gallery (Smithsonian Institution)
1
Pennsylvania Academy of the Fine Arts
1
Ploog, Randy
1
Trust for Museum Exhibitions
1
Weintraub, Stanley, 1929-
1