Gupta, Prem Kumar. Operations research / By Gupta, Prem Kumar and Hira, D.S. - 1 - New Delhi ; S Chand and Company Ltd , 2007. - xii,1377p. ; 24.5 cm. ISBN: 9788121902819 Subjects--Topical Terms: Transportation modelPrabability theoryDynamic programming Dewey Class. No.: 003 / GUPP