Heer, D. (1978). Society and population (2nd.). Prentice Hall.
Chicago-čujuhus (17. p.)Heer, David. Society and Population. 2nd. New Delhi: Prentice Hall, 1978.
MLA-čujuhus (9. p.)Heer, David. Society and Population. 2nd. Prentice Hall, 1978.
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