McGRAW-HILL ENCYCLOPEDIA OF SCIENCE & TECHNOLOGY
Copyright ©0 1992, 1987, 1982, 1977, 1971, 1966, 1960 by McGraw-Hill, Inc.
All rights reserved. Printed in the United States of America.
Except as permitted under the United States Copyright Act of 1976,
no part of this publication may be reproduced or distributed in any
form or by any means, or stored in a database or retrieval system,
without the prior written permission of the publisher.
1234567890 DOW/DOW 998765432
Library of Congress Cataloging in Publication data4
McGraw-Hill encyclopedia of science & technology :an international reference
work in twenty volumes including index. - 7th ed.
p. cm.
Includes bibliographical references and index.
ISBN 0-07-909206-3
I. Science-Encyclopedias. 2. Technology-Encyclopedias.
I. Title: McGraw-Hill encyclopedia of science and technology.
11. Title: Encyclopedia of science & technology.
111. Title: Encyclopedia of science and technology.
Q121.M3 1992 503--dc2O 91-36349
ISBN 0-07-9091206-3 {SET} I
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