The three R's: residence, religion, and reproduction.

This publication has 4 references indexed in Scilit:

• A further look at catholic fertility
  Demography, 1966
• Fertility Expectations in the United States: 1962-64
  Population Index, 1966
• Residence and Status Differences in Fertility
  The Milbank Memorial Fund Quarterly, 1965
• The Stability and Reliability of Expected Family Size Data
  The Milbank Memorial Fund Quarterly, 1959