Pitt-Rivers, G. H. L. F. (1932). Problems of population: Being the report of the proceedings of the second general assembly of the International union for the scientific investigation of population problems ... London, June 15-18, 1931. London: G. Allen & Unwin Ltd..

Pitt-Rivers, George Henry Lane Fox. Problems of Population: Being the Report of the Proceedings of the Second General Assembly of the International Union for the Scientific Investigation of Population Problems ... London, June 15-18, 1931. London: G. Allen & Unwin Ltd., 1932.

Pitt-Rivers, George Henry Lane Fox. Problems of Population: Being the Report of the Proceedings of the Second General Assembly of the International Union for the Scientific Investigation of Population Problems ... London, June 15-18, 1931. London: G. Allen & Unwin Ltd., 1932.