Sorokin, Pitirim Aleksandrovich, 1889- Social & cultural dynamics : a study of change in major systems o f art, truth, ethics, law, and social relationships / Pitirim, A. So rokin. - Boston : Extending Horizons Books, [1957] - 718 p. : illus. ; 22 cm. Subjects--Topical Terms: Civilization--Philosophy.History--Philosophy.Culture. Dewey Class. No.: 901 SOR