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By Philberth, Bernhard.
Plumpton NSW BAC Australia 1994 .
203 p. 21 cm..
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Madrid BAC 2002 .
763 p. , Includes bibliographical references and indexes. | Translated into Italian. 20 cm..
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By Vázquez, Jesús María.
Madrid Instituto de Sociología Aplicada | Distribución, BAC 1983 .
200 p. 22 cm..
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