Caldwell, John C. The socio-economic explanation of high fertility : papers on the Yoruba Society of Nigeria / John C. Caldwell. - Canberra : Dept. of Demography, Australian National University, 1976 - vii, 133 p. : - Changing african family project series . Includes bibliographical references. ISBN: 0708101437 Subjects--Topical Terms: Yoruba (African people)Yoruba (African people)Fertility, Human--Nigeria. Dewey Class. No.: 301.32 / CAL