Siddiqui, Tanveer. Natural language processing and information retrieval / by Tanveer Siddiqui and U. S. Tiwary - New Delhi : Oxford University Press , 2008. - ix,406p.: ills.; 25cm. Includes index. ISBN: 9780195692327 Rs.525.00 Subjects--Topical Terms: NATURAL LANGUAGE PROCESSINGINFORMATION RETRIEVAL Dewey Class. No.: 006.35 / SID/N