301.32
P538P
           Phelps, Harold A
               Population in its human aspects \ Harold A Phelps - New York : Appleton-Centry-Crofts, 1958.
               xvi, 512p. - Sociology series/ed. by J F Cuber .
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                Subjects: Population; Human ecology; Fertility, Human; Birth control; Fertility, Human-Statistics.