Freedman, R., Whelpton, P. K., & Campbell, A. A. (1959). Family planning sterility and population growth. New York: McGraw-Hill.
Παραπομπή Chicago StyleFreedman, Ronald, Pascal K. Whelpton, and Arthur A. Campbell. Family Planning Sterility and Population Growth. New York: McGraw-Hill, 1959.
Παραπομπή MLAFreedman, Ronald, Pascal K. Whelpton, and Arthur A. Campbell. Family Planning Sterility and Population Growth. New York: McGraw-Hill, 1959.
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