In 1937 he joined the American Museum of Natural History in New York City, and was Chairman of the Department of Ornithology from 1957 until 1973.
He was Chairman of the Department of Ornithology from 1957 until 1973. In 1937 he joined the American Museum of Natural History in New York City.
In 1937 he joined the American Museum of Natural History in New York City. He was Chairman of the Department of Ornithology from 1957 until 1973.
In 1937 he joined the American Museum of Natural History in New York City. He was Chairman of the Department of Ornithology from 1957 until 1973.