id author title date pages extension mime words sentence flesch summary cache txt crl-12634 Bommer, Michael; Ford, Bernard A Cost-Benefit Analysis for Determining the Value of an Electronic Security System 1974-07-01 10 .pdf application/pdf 4997 247 64 TABLE 2 SAMPLING OF DOCUMENTS LosT: SEPT.-OcT. 1971 Document Acquisition Date 1971 1970 1969 1968 Total Number of DocQments in Sample0 313 388 365 325 1,391 Number of Documents Lost as of Sept.-Oct. Based upon the estimated number of lost documents, a further estimate is made regarding the number lost by theft. cache/crl-12634.pdf txt/crl-12634.txt