TY  - CHAP
A1  - Bardet, J.P.
T1  - Innovators and imitators in the practice of contraception in town and country
Y1  - 1990
A3  - van de Woude, A.
A3  - de Vries, J.
A3  - Hayami, A. 
T2  - Urbanization in history: A process of dynamic interactions
CY  - Oxford
PB  - Clarendon Press

ER  -