Population census methods.
United Nations. Department of Economic and Social Affairs. Population Division.
Lake Success, N.Y. : Department of Social Affairs, 1949.
The population of Ruanda-Urundi.
United Nations. Department of Economic and Social Affairs. Population Division.
New York : U.N. Dept. of Social Affairs, 1953.
Problems of migration statistics.
United Nations. Department of Economic and Social Affairs. Population Division.
Lake Success, N.Y. : U.N. Dept. of Social Affairs., 1949.