TY  - JOUR
A1  - Massey, D.S.
A1  - García España, F.
T1  - The social process of international migration
Y1  - 1987
DO  - 10.1126/science.237.4816.733
JF  - Science
VL  - 237
IS  - 4816
SP  - 733
EP  - -738

ER  -