Shuster, G. N., & Barrett, D. N. (1963). The problem of population. Notre Dame, IN: University of Notre Dame Press.
Παραπομπή Chicago StyleShuster, George N., and Donald N. Barrett. The Problem of Population. Notre Dame, IN: University of Notre Dame Press, 1963.
Παραπομπή MLAShuster, George N., and Donald N. Barrett. The Problem of Population. Notre Dame, IN: University of Notre Dame Press, 1963.
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