WRIGGINS, W. H. (1973). Population, politics and the future of. Columbia U.P.
Chicago-čujuhus (17. p.)WRIGGINS, W. Howard. Population, Politics and the Future of. New York: Columbia U.P, 1973.
MLA-čujuhus (9. p.)WRIGGINS, W. Howard. Population, Politics and the Future of. Columbia U.P, 1973.
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