IRE Retrieval system tests 1958-1978 chapter Karen Sparck Jones Butterworth & Company Karen Sparck Jones All rights reserved. No part of this publication may be reproduced or transmitted in any form or by any means, including photocopying and recording, without the written permission of the copyright holder, application for which should be addressed to the Publishers. Such written permission must also be obtained before any part of this publication is stored in a retrieval system of any nature. References 255 124: GULL, C[OCRerr] D. Seven years of work on the organisation of materials in the special library, American Documentation 7, 32[OCRerr]329 (1956) 125. SWANSON, D. R. Searching natural language text by computer, Science, N.Y. 132, 1099-1104 (1960)