Study of theories and models of information storage and retrieval - Lehigh University. Center for the Information Sciences (Bethlehem Lehigh University)
Library has: Report no.7-Graphs and algorithms for term relations by D J Hillman, 1964; No.8-Structure of document relations by D J Hillman, 1964; No.9-Topology and document retrieval operations by D J Hillman, 1965.
Keywords: Document relations; Information storage and retrieval