@book{137910,
	author = {Rivett, Patrick.},
	title = {Concepts of operational research /},
	publisher = {Watts,},
	year = {1968.},
	series = {The New thinker's library, no. 22},
	address = {London:},
	note = {American ed. (New York Basic Books) has title: An introduction to operations research.}
}