On Foster's Information Storage and Retrieval Using AVL Trees CACM September, 1972 Tan, K. C. binary trees, search trees, information storage, information retrieval 3.70 3.73 3.74 CA720912 JB January 27, 1978 4:10 PM 2278 5 2278 2278 5 2278 2278 5 2278 2455 5 2278 2278 6 2278 2388 6 2278