id author title date pages extension mime words sentence flesch summary cache txt crl-11533 Williams, Edwin E. Magnitude of the Paper-Deterioration Problem as Measured by a National Union Catalog Sample 1962-11-01 2 .pdf application/pdf 874 55 74 T h e number of different book titles represented was 10,493,300 or, since the average number of volumes per title was 1.37, approximately 14,376,000 volumes. T h e average number of pages per title was estimated at 285.8965, so the number of pages represented by all book titles in the catalog was estimated at 2,999,998,000. cache/crl-11533.pdf txt/crl-11533.txt