American Museum of Natural History.; American Museum of Natural History. Employees' Benefit Association.(New York, N.Y. : Employees' Benefit Association of the American Museum of Natural History, 1955-1960)
American Museum of Natural History.; American Museum of Natural History. Employees' Benefit Association.(New York, N.Y. : Employees' Benefit Association of the American Museum of Natural History, 1937-1941)
American Museum of Natural History.; American Museum of Natural History. Employees' Benefit Association.(New York, N.Y. : Employees' Benefit Association of the American Museum of Natural History, 1960-1962)