Donald J. Hillman Negotiation of inquiries in an on-line retrieval system. [Citation Graph (0, 0)][DBLP] Information Storage and Retrieval, 1968, v:4, n:2, pp:219-238 [Journal]
Donald J. Hillman Customized user services via interactions with leadermart. [Citation Graph (0, 0)][DBLP] Information Storage and Retrieval, 1973, v:9, n:11, pp:587-596 [Journal]
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