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Sills, D, L., , . (). International Encyclopedia of the social sciences volumes 15 16 and 17 soci zoos index complete and unabridged . New: New York: The Mcmillan Co.& The Free Press; 1968.

Gaya MLA

Sills, David, L.., , . "International Encyclopedia of the social sciences volumes 15 16 and 17 soci zoos index complete and unabridged". New: New York: The Mcmillan Co.& The Free Press; 1968, . Text.