id author title date pages extension mime words sentence flesch summary cache txt crl-12181 American Library Association, Abstracts 1969-11-01 3 .pdf application/pdf 1847 116 53 The use of mathemati- cal models in library operations research is discussed. This paper reviews the research on de- sign and operation of research libraries sponsored by the Purdue University Li- braries and the Purdue School of Indus- trial Engineering. cache/crl-12181.pdf txt/crl-12181.txt