Walden dos - B. F. Skinner

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T穩tulo del original: Walden Two Direcci籀n de la colecci籀n: Virgilio Ortega B. F. SKINNER WALDEN DOS 穢 Copyright 1948 in the United States of America by B. F. Skinner All rights reserved-no part of this book may be reproduced in any form without permission in writing from the publisher, except by a reviewer who wishes to quote brief passages in connection with a review limited for inclusion in magazine or newspaper. 穢 Editorial Fontanella, S.A. - 1968 穢 Por la presente edici籀n. Ediciones Orbis, S…