IRS13 Scientific Report No. IRS-13 Information Storage and Retrieval Document Length chapter E. M. Keen Harvard University Gerard Salton Use, reproduction, or publication, in whole or in part, is permitted for any purpose of the United States Government. v-6o [OCRerr]eferences [OCRerr]l] C. Cleverdon, J. Mills and N. Keen, Factors Determining the Performance of Indexing Systems. Volume 1, Te[OCRerr]t Design, Aslib Cranfield Research Project, Cranfield, 1966. L2J C. Cleverdon and N. Keen, Factors Determining the Performance of Indexing Systems. Volume 2, Teat Results, Aslib Cranfield Research Project, Cranfield, 1966.