TY  - JOUR
A1  - Wachter, K.W.
A1  - Lee, R.D.
T1  - U.S. births and limit cycle models
Y1  - 1989
DO  - 10.2307/2061497
JF  - Demography
VL  - 26
IS  - 1
SP  - 99
EP  - -115

ER  -