© 1989 by W. B. Saunders Company. Copyright under the Uniform Copyright Convention. Simultaneously published in Canada. All rights reserved. This publication is protected by copyright. No part of it may be reproduced stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without written permission for the publisher. Printed in the United States of America
English
Русский
O'zbekcha