TY  - JOUR
A1  - Chen, K.H.
A1  - Wishik, S.M.
A1  - Scrimshaw, S.
T1  - Effects of unstable sexual unions on fertility in Guayaquil, Ecuador
Y1  - 1974
JF  - Social Biology
VL  - 21
SP  - 353
EP  - -359

ER  -