A theory of indexing / Gerard Salton. Salton, Gerard. Automatic indexing. Z695.92 .S27 025.3 SAL "Outgrowth of the Regional Conference on Automatic Information Organization and Retrieval ... held at the University of Missouri in Columbia ... in July 1973." Includes bibliographical references. Philadelphia : Society for Industrial and Applied Mathematics, 1975. 1975. 1975 Text v, 56 p. : eng Regional conference series in applied mathematics ; 18