TY  - BOOK
AU  - Pearl,Raymond
TI  - ... The natural history of population / 
PY  - 1939///
CY  - London : ,  London : , London : 
PB  - Oxford University Press ; ,  H. Milford, , H. Milford, 
KW  - Population
KW  - Fecundity
KW  - Birth control
N1  -  Includes bibliographical references (p. 356-398)
ER  -