Approximating Block Accesses in Database Organizations CACM April, 1977 Yao, S. B. database, inverted file organization, database performance and measurement, information retrieval, query answering 3.70 3.72 4.33 CA770406 JB December 29, 1977 5:06 AM 2976 4 2976 2976 4 2976 2976 4 2976 2688 5 2976 2765 5 2976 2882 5 2976 2976 5 2976 2976 5 2976 2976 5 2976