TY  - BOOK
AU  - Greep,Roy O.
ED  - The American Academy of Arts and Sciences.
TI  - Human fertility and population problems
U1  - 577.9 
PY  - 1963///
CY  - Cambridge, Massachusetts
PB  - Schenkman
KW  - POBLACION
KW  - DEMOGRAFIA
KW  - FECUNDACION
KW  - ECOLOGIA HUMANA
KW  - PREVISION DEMOGRAFICA
ER  -