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© G. C. Branco, L. Lavoura, and J. P. Silva 1999

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First published 1999

First published in paperback 2014

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British Library Cataloguing in Publication Data

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Library of Congress Control Number: 2014498644

ISBN 978–0–19–850399–6 (hbk.)

ISBN 978–0–19–871675–4 (pbk.)

DOI: 10.1093/oso/9780198503996.001.0001

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