
Daan Hoeksema (Dutch, 1879-1935)

Robert Stöcklin (Swiss, 1889–1931)

Laboratoires Longuet (French, 20th Century)

Laboratoires Longuet (French, 20th Century)

Imp. Charles Lévy (French, 19th/20th century)

Henrik Backer (Norwegian, 1865-1948)

Pavel Tchelitchew (Russian, 1898-1957)

U.S. Information Agency (American, 1953-1999)

Angelika Hoerle (German, 1899-1923)

Bert Thomas (English, 1883-1966)

Anonymous

Anonymous

Imp. Emile Lévy (French, 19th/20th century)

U.S. Information Agency (American, 1953-1999)

Joseph Christian Leyendecker (American, 1874 - 1951)

National Institutes of Health (American, 1887-)

Adolf Karpellus (Austrian, 1869-1919)

Walter Ditz (Czech, 1887–1925)

Anonymous