Information Structures for Processing and Retrieving CACM January, 1962 Colilla, R. A. Sams, B. H. CA620102 JB March 20, 1978 4:48 PM 657 4 657 657 4 657 1136 5 657 279 5 657 409 5 657 657 5 657 657 5 657 657 5 657 493 6 657 616 6 657 657 6 657