TY  - BOOK
AU  - Campbell, Arthur A
AU  - Grabill, Wilson H
AU  - Kiser, Clyde V
TI  - Trends and variations in fertility in the United States
CY  - Cambridge
KW  - Fertility - United States
KW  - Fertility rates
KW  - Illegitimacy
KW  - Migration
KW  - Population - United States
ER  -