TY  - BOOK
AU  - Forster, Colin, and Tucker, G. S. L.
AU  - Tucker, G. S. L. ; jt. auth.
TI  - Economic opportunity and white American fertility ratios, 1800-1860
U1  - 304.6309034 
PY  - 1972///
CY  - New Haven
PB  - New Haven University Press
ER  -