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Copyright © 1967 by Southern Illinois University Press Paperback edition copyright © 2010 by the Board of Trustees, Southern Illinois University All rights reserved Printed in the United States of America 13 12 11 10 4 3 2 1 Library of Congress Control Number: 67-21038 ISBN 13: 978-0-8093-2975-5 ISBN 10: 0-8093-2975-1 ISBN 13: 978-0-8093-02628 ISBN 10: 0-8093-0262-4 The paper used in this publication meets the minimum requirements of American National Standard for Information Sciences—Permanence of Paper for Printed Library Materials, ANSI Z39.48-1992. ...