TY  - JOUR
A1  - Kelsey, J.L.
A1  - Gammon, M.D.
A1  - John, E.M.
T1  - Reproductive factors and breast cancer
Y1  - 1993
JF  - Epidemiological Reviews
VL  - 15
IS  - 1
SP  - 36
EP  - -47

ER  -