B C, before computers on information technology from writing to the age of digital data von Robertson, S. E. 1946-

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New Models in probalistic information retrieva; von Rijsbergen, Cornelis J. van 1943-, Robertson, S. E. 1946-, Porter, Martin F.

Statistical problems in the application of probabilistic models to information retrieval final report to the British Library Research and Development Department on projekt SI/G/517 von Robertson, S. E., Bovey, J. D.

Five specialised information centres von Robertson, S. E.

A theoretical Model of the retrieval characteristics of information retrieval systems von Robertson, S. E. 1946-