The significance of the Cranfield tests on index languages

Cyril W. Cleverdon
1991 Proceedings of the 14th annual international ACM SIGIR conference on Research and development in information retrieval - SIGIR '91  
doi:10.1145/122860.122861 dblp:conf/sigir/Cleverdon91 fatcat:qfqkp5whazaw5em3lwqisbk6ne