George M. Reevs (American, 1864-1930)
U.S. Information Agency (American, 1953-1999)
S. Flanchoin (French, 19th/20th century)
Giovanni Battista Carpanetto (Italian, 1863-1928)
National Institutes of Health (American, 1887-)
A.W.B. Lincoln (American, 19th/20th Century)
August William Hutaf (American, 1874-1942)
Anonymous
Anonymous
Frank S. Nicholson (American, 20th Century)
Alan Peckolick (American, 1940-2017)
Anonymous
U.S. Information Agency (American, 1953-1999)
U.S. Information Agency (American, 1953-1999)
NASA (American, 1958 -)
Anonymous
Edward Penfield (American, 1866 - 1925)
Anonymous
Joseph Stall (French, 1874–1933)
U.S. Lithograph Co. (American, 19th/20th Century)
George Reiter Brill (American, 1867 - 1918)
Florence Lundborg (American, 1871-1949)
Johannes Handschin (Swiss, 1899-1948)
Gisbert Combaz (Belgian, 1869-1941)
Anonymous
Plinio Codognato (Italian, 1878-1940)