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First published 1969 Reprinted 1971 Second edition 1972 Reprinted 1974 © J . L . T u r k , 1972 ISBN 0-433-32851-7 Text set in 10/11 pt. Monotype New Times Roman, printed by letterpress, and bound in Great Britain at The Pitman Press, Bath First published 1969 Reprinted 1971 Second edition 1972 Reprinted 1974 © J. L. Turk, 1972 ISBN 0-433-32851-7 Text set in lOj11 pt. Monotype New Times Roman, printed by letterpress, and bound in Great Britain at The Pitman Press, Bath