id author title date pages extension mime words sentence flesch summary cache txt crl-13702 American Library Association, Letters 1981-05-01 6 .pdf application/pdf 3569 184 60 Mr. Shill states in his abstract that Direct shelf access ... contributed to an increase in library use and a decrease in cir- culation. The ratio of enrolled students to library use was 1:28.4 in 1973 and 1:23.9 in 197~a reduc- tion of more than fifteen percent. cache/crl-13702.pdf txt/crl-13702.txt