First published by Iliffe Books Ltd 1966 Second edition 1969 Reprinted 1970 Third edition 1975 Reprinted with revisions 1977 Reprinted 1979 Fourth edition published by Butterworth-Heinemann 1982 Reprinted 1985 Fifth edition 1989 Reprinted 1991, 1993 Sixth edition 1995 Reprinted 1995, 1996, 1998 Seventh edition 1999 0 J. A. Brydson 1995, 1999 All rights reserved. No part of this publication may be reproduced in any material form (including photocopying or storing in any medium by electronic means and whether or not.
