CRANV2 Aslib Cranfield Research Project: Factors Determining the Performance of Indexing Systems: Volume 2 Main test results chapter Cyril Cleverdon Michael Keen Cranfield An investigation supported by a grant to Aslib by the National Science Foundation. Use, reproduction, or publication, in whole or in part, is permitted for any purpose of the United States Government. - 128 - 9O -! FIGURE 4.420P THRFE LEVELS OF EXHAUSTIVITY WITH INDEX DOCUMENTS. (FIGURES 4.401T, 4.400T and 4,100T) FIGURE 4.421P THREE LEVELS OF EXHAUSTIVITY WITH INDE) LANGUAGE I.l.a, 35 QUESTIONS. 1400 DOCUMENTS. (FIGURES 4.403T. 4.402T and 4.110T) I, I