@book{9779,
	author = {Seminar on Operational Research and Decision Making, Deptt. of Operational Research, Univ. of Delhi, March 28-30, 1981 and Aggarwal, S. P. ; ed.},
	title = {Operational research in managerial systems; revised version of some selected papers presented at the all India seminar},
	publisher = {Academic Press},
	year = {1984},
	address = {Delhi}
}