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MAINSPRINGS OF CIVILIZATION BY ELLSWORTH HUNTINGTON. YALE UNIVERSITY.672 PAGES. JOHN WILEY AND SONS NEW YORK. CHAPMAN AND HALL. LONDON, 1945. A CIVILIZACAO E SEUS PRINCIPAIS FATORES BIOLOGICO AMBIENTAL E CULTURAL. PROF. DR. DARCY CARVALHO FEAUSP. SAO PAULO. BRAZIL, 2016. STUDIES ON PHILOSOPHY OF HISTORY. FILOSOFIA DA HISTORIA
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