@book{15766,
	author = {Symposium on Systems Analysis, Xian, Shoonxi Province(China), April 17-22, 1981 and Gray, Paul},
	title = {Systems analysis},
	publisher = {John Wiley,},
	year = {1983},
	address = {New York:},
	note = {"A wiley-interscience & China academic pubs. joint publication"}
}