Robert Leicester Wagner (American, 1872-1942)
Esther Verdonk (Dutch, 20th Century)
NASA (American, 1958 -)
Frank Xavier Leyendecker (American, 1876-1924)
Anonymous
Benjamin Roubaud (French, 1811 - 1847)
Artcraft Lithograph (American, 1905–1970)
National Institutes of Health (American, 1887-)
Ramón Casas (Spanish, 1866 – 1932)
Anonymous
Anonymous
Eric Rohman (Swedish, 1891 - 1949)
U.S. Information Agency (American, 1953-1999)
Edgar Longman (English, 20th Century)
Edward Penfield (American, 1866 - 1925)
Ernest Coffin (English, active 1920s-1930s)
Bureau of the Census (American, 1902 - )
National Institutes of Health (American, 1887-)
Anonymous
Georges de Feure (French, 1868-1943)
Dorothy Waugh (American, 1896-1996)
John Blair Mitchell (American, 1921-1999)
George Reiter Brill (American, 1867 - 1918)
Leopoldo Metlicovitz (Italian, 1868–1944)