Committee on Population, National Research Council ; Cohen, Barney ; Gary D. Sandefur, Ronald R. Rindfuss, and Barney Cohen ; Rindfuss, Ronald R. ; Sandefur, Gary D. ; Barney Cohen ; Gary D. Sandefur ; Ronald R. Rindfuss ; Commission on Behavioral and Social Sciences and Education ; Committee on Population ; Division of Behavioral and Social Sciences and Education ; National Research Council (U.S.)