CAMBRIDGE UNIVERSITY PRESS Cambridge,New York,Melbourne,Madrid,Cape Town,Singapore,Sao Paulo Cambridge University Press The Edinburgh Building.Cambridge CB2 2RU,UK Published in the United States of America by Cambridge University Press,New York www.cambridge.org Information on this title:www.cambridge.org/9780521630238 Cambridge University Press 2000 This publication is in copyright.Subject to statutory exception and to the provision of relevant collective licensing agreements,no reproduction of any part may take place without the written permission of Cambridge University Press. First published in print format 2000 ISBN-13 978-0-511-22161-3 eBook (Adobe Reader) ISBN-Io O-5II-22161-4 eBook (Adobe Reader) ISBN-13 978-0-521-63023-8 hardback ISBN-10 0-521-63023-I hardback ISBN-13 978-0-521-63975-o paperback ISBN-I0 0-$21-63975-I paperback Cambridge University Press has no responsibility for the persistence or accuracy of URLs for external or third-party internet websites referred to in this publication,and does not guarantee that any content on such websites is,or will remain,accurate or appropriate.cambridge university press Cambridge, New York, Melbourne, Madrid, Cape Town, Singapore, São Paulo Cambridge University Press The Edinburgh Building, Cambridge cb2 2ru, UK First published in print format isbn-13 978-0-521-63023-8 isbn-13 978-0-521-63975-0 isbn-13 978-0-511-22161-3 © Cambridge University Press 2000 2000 Information on this title: www.cambridge.org/9780521630238 This publication is in copyright. Subject to statutory exception and to the provision of relevant collective licensing agreements, no reproduction of any part may take place without the written permission of Cambridge University Press. isbn-10 0-511-22161-4 isbn-10 0-521-63023-1 isbn-10 0-521-63975-1 Cambridge University Press has no responsibility for the persistence or accuracy of urls for external or third-party internet websites referred to in this publication, and does not guarantee that any content on such websites is, or will remain, accurate or appropriate. Published in the United States of America by Cambridge University Press, New York www.cambridge.org hardback paperback paperback eBook (Adobe Reader) eBook (Adobe Reader) hardback