TY  - JOUR
A1  - Butz, W.P.
A1  - Ward, M.P.
T1  - The Emergence of Countercyclical U.S. Fertility
Y1  - 1979
DO  - 10.2307/1807367
JF  - The American Economic Review
VL  - 69
IS  - 3
SP  - 318
EP  - -328

ER  -