TY  - BOOK
AU  - Charles, Enid.
TI  - The menace of under-population: a biological study of the decline of population growth ... 
U1  - 312 
PY  - 1936///
CY  - London
PB  - Watts & co.,
KW  - Population
KW  - Birth control
KW  - Vital Statistics
N1  - "Originally issued under the title of "The twilight of parenthood.""
ER  -