Who contributed to this book
by teaching me that hard work can be
satisfying if the task is worthwhile.
Copyright © 1965 by Paul E. Pfeiffer.
Copyright © 1978 by Paul E. Pfeiffer.
All rights reserved.
Bibliographical Note
This Dover edition, first published in 1978, is an unabridged republication of the work originally published by McGraw-Hill Book Company, New York, in 1965. This Dover edition has been extensively revised and updated by the author.
Library of Congress Catalog Card Number: 78-53757
International Standard Book Number
ISBN 13: 978-0-486-63677-1
ISBN 10: 0-486-63677-1
Manufactured in the United States by Courier Corporation
63677107
www.doverpublications.com