Otis Lithograph Co (American, 19th/20th Century)
National Institutes of Health (American, 1887-)
Centers for Disease Control and Prevention (American, 1946-)
Anonymous
Anonymous
National Institutes of Health (American, 1887-)
Antonio Arias Bernal (Mexican, 1914-1960)
George Reiter Brill (American, 1867 - 1918)
Anonymous
Edward Penfield (American, 1866 - 1925)
Anonymous
Anonymous
William Emile Schumacher (American, 1870-1931)
R.H. Porteus (American, 19th/20th Century)
Anonymous
Edward Penfield (American, 1866 - 1925)
Edward Penfield (American, 1866 - 1925)
National Institutes of Health (American, 1887-)
Sperry (American, 20th Century)
Anonymous