Methods of appraisal of quality of basic data for population estimates.

Manylion Llyfryddiaeth
Awdur Corfforaethol:	United Nations. Dept. of Economic and Social Affairs
Fformat:	Llyfr
Iaith:	English
Cyhoeddwyd:	New York [s.n.] 1955.
Cyfres:	Its Population studies no. 23
Pynciau:	Population forecasting.