United States. National Aeronautics and Space Administration 481
SpringerLink (Online service) 393
United States. National Aeronautics and Space Administration, 316
United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch, 168
Langley Research Center 160
Goddard Space Flight Center 152
Langley Research Center, 117
Metropolitan Museum of Art (New York, N.Y.) 115
Oxford Scholarship Online 109
Lewis Research Center, 97
Museum of Modern Art (New York, N.Y.) 90
Lewis Research Center 89
Jet Propulsion Laboratory (U.S.) 85
National Endowment for the Arts 79
National Science Foundation (U.S.) 76
National Gallery of Art (U.S.) 68
George C. Marshall Space Flight Center 65
United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch 65
ScienceDirect (Online service) 60
George C. Marshall Space Flight Center, 55
ProQuest (Firm) 51
EBSCOhost 48
Los Angeles County Museum of Art 43
Whitney Museum of American Art 40
Lyndon B. Johnson Space Center, 39
United States. National Aeronautics and Space Administration. Office of Inspector General 39
National Endowment for the Arts, 37
United States. National Aeronautics and Space Administration. Scientific and Technical Information Division 36
NASA Glenn Research Center 34
Ames Research Center 32
Art Institute of Chicago 31
National Endowment for the Humanities 31
United States. National Aeronautics and Space Administration. Scientific and Technical Information Program 30
Lyndon B. Johnson Space Center 28
Museum of Fine Arts, Boston 27
NASA Glenn Research Center, 27
National Science Foundation (U.S.). Division of Science Resources Studies 27
United States. National Aeronautics and Space Administration. Education Division 27
Ames Research Center, 26
United States. National Aeronautics and Space Administration. History Office 25
Ebooks Corporation 23
Goddard Space Flight Center, 23
Heller, Steven 20
Museum of Fine Arts, Houston 20
Institute of Museum and Library Services (U.S.), 18
Royal Academy of Arts (Great Britain) 18
United States. National Aeronautics and Space Administration. Scientific and Technical Information Office, 18
Wright, Frank Lloyd, 1867-1959 18
Hirshhorn Museum and Sculpture Garden 17
Picasso, Pablo, 1881-1973 17
Rembrandt Harmenszoon van Rijn, 1606-1669 17
Amon Carter Museum of Western Art 16
National Gallery (Great Britain) 16
Philadelphia Museum of Art 16
Dallas Museum of Art 15
Fine Arts Museums of San Francisco 15
Wilson, Robert M., 15
Cleveland Museum of Art 14
Gogh, Vincent van, 1853-1890 14
Matisse, Henri, 1869-1954 14
National Collection of Fine Arts (U.S.) 14
National Science Foundation (U.S.), 14
Solomon R. Guggenheim Museum 14
United States. National Aeronautics and Space Administration. Scientific and Technical Information Program, 14
American Federation of Arts 13
Cézanne, Paul, 1839-1906 13
Gerald Peters Gallery 13
J. Paul Getty Museum 13
National Art Education Association 13
National Museum of American Art (U.S.) 13
Turner, J. M. W. 1775-1851 13
United States. National Aeronautics and Space Administration. Scientific and Technical Information Office 13
United States. National Park Service. Preservation Assistance Division 13
Brooklyn Museum 12
Denver Art Museum 12
Hugh L. Dryden Flight Research Center 12
Institute of Museum and Library Services (U.S.) 12
Janson, H. W. 1913-1982 12
Metropolitan Museum of Art (New York, N.Y.), 12
Museum of Contemporary Art (Los Angeles, Calif.) 12
National Endowment for the Arts. Research Division 12
O'Keeffe, Georgia, 1887-1986 12
Selz, Peter, 1919-2019 12
Elderfield, John 11
J. Paul Getty Museum, 11
Leonardo, da Vinci, 1452-1519 11
Lucie-Smith, Edward 11
Noor, Ahmed Khairy, 1938- 11
Williams, Kim, 1956- 11
Detroit Institute of Arts 10
Dürer, Albrecht, 1471-1528 10
Fishel, Catharine M. 10
Gauguin, Paul, 1848-1903 10
Gombrich, E. H. 1909-2001 10
Hayward Gallery 10
John F. Kennedy Space Center 10
Kimbell Art Museum 10
Michelangelo Buonarroti, 1475-1564 10
Monet, Claude, 1840-1926 10
Moore, Henry, 1898-1986 10