The effect of tropical sunlight on the development of bones of children in Puerto Rico; a roentgenographic and clinical study of infants and young children with special reference to rickets and related factors,
by Martha M. Eliot ...
- Washington, U.S. Govt. print. off., 1933.
- v, 122 p. ill., plates.
At head of title: United States Department of labor. Frances Perkins, secretary. Children's bureau. Grace Abbott, chief.