TY  - JOUR
A1  - Davis, D.L.
A1  - Gottlieb, M.B.
A1  - Stampnitzky, J.R.
T1  - Reduced ratio of male to female births in several industrial countries: A sentinel health indicator?
Y1  - 1998
DO  - 10.1001/jama.279.13.1018
VL  - 279
IS  - 13

ER  -