Rong, Mahendra On some inventory models with lead time or preparation time in uncertain environment / researched by Mahendra Rong; guided by Manoranjan Maiti. - Midnapore : Vidyasagar University, 2008. - v,263p. : figs.,tables ; 24cm Document represents Ph.D Thesis Subjects--Index Terms: INVENTORY MODELS-MATHEMATICS PROBABILITIES-MATHEMATICS Dewey Class. No.: 519.83 / RON/O