COLLECTIF - Fifteenth census of the United States: 1930. OUTLYING TERRITORIES AND POSSESSIONS. Number and distribution of inhabitants. Composition and characteristics of the population. Occupations Unemployment and Agriculture. U.S. Departement of Commerce. R. P. Lamont secretary. Bureau of the Census. Prepared under the Supervision of Staark M.Grogan
United States Government Printing Office Washington 1932.