TY  - BOOK
ED  -  United Nations.
TI  - Population Bulletin of the United Nations. no. 4, December 1954
T2  - Population Bulletin of the United Nations
SN  -  0251-760
U1  - 100 SD:312 
PY  - 0000///151954///
CY  - New York : 
PB  - UN, 
KW  - POPULATION
KW  - FERTILITY
KW  - POPULATION TRENDS
KW  -  DEMOGRAPHIC AGEING
N1  - Gaps in existing knowledge of the relationships between population trends and economic and social conditions -- Fertility according to size of family : application to Australia / Louis Henry -- Differential fertility in Ceylon -- Earl Huyck -- The cause of the ageing of populations: declining mortality or declining fertility?
ER  -