Variations in the incidence of knowledge and use of contraception.

Manylion Llyfryddiaeth
Awdur Corfforaethol:	United Nations. Department of International Economic and Social Affairs
Fformat:	Llyfr
Iaith:	English
Cyhoeddwyd:	New York United Nations 1981.
Pynciau:	Family planning > Underdeveloped areas. KAP (Birth control).