
Jules De Praetere (Belgian, 1879-1947)

René Gabriel (French, 1890 - 1950)

Anonymous

Emil Könlein (Swiss, 1901-1965)

Anonymous

Rachael Romero (Australian, b. 1953)

Jan Toorop (Dutch, 1858-1928)

NASA (American, 1958 -)

Anonymous

Julius Klinger (Austrian, 1876 – 1942)

Leo Prochownik (German, 1875-1936)

Othar Holmboe (Norwegian, 1868-1928)

Edward Penfield (American, 1866 - 1925)

Anonymous

Julius Klinger (Austrian, 1876 – 1942)

Anonymous

Bureau of the Census (American, 1902 - )

Anonymous

Anonymous

Henry Summer Watson (American, 1868-1933)

Anonymous