Frankel, L. B. (1970). This crowded world; an introduction to the study of population. Columbia Books.
Chicago-viite (17. p.)Frankel, Lillian Berson. This Crowded World; an Introduction to the Study of Population. Washington: Columbia Books, 1970.
MLA-viite (9. p.)Frankel, Lillian Berson. This Crowded World; an Introduction to the Study of Population. Columbia Books, 1970.
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