National Research Council (U.S.). Committee on Population and Demography., Lapham, R. J., & Bulatao, R. A. (1981). Research on the population of China: Proceedings of a workshop. Washington, D.C.: National Academy Press : Available from Bureau of Oceans and International, Environmental, and Scientific Affairs, U.S. Dept. of State.

National Research Council (U.S.). Committee on Population and Demography., Robert J. Lapham, and Rodolfo A. Bulatao. Research On the Population of China: Proceedings of a Workshop. Washington, D.C.: National Academy Press : Available from Bureau of Oceans and International, Environmental, and Scientific Affairs, U.S. Dept. of State, 1981.

National Research Council (U.S.). Committee on Population and Demography., Robert J. Lapham, and Rodolfo A. Bulatao. Research On the Population of China: Proceedings of a Workshop. Washington, D.C.: National Academy Press : Available from Bureau of Oceans and International, Environmental, and Scientific Affairs, U.S. Dept. of State, 1981.