@book{61622,
	author = {Mason, David},
	title = {Intermediate systems analysis},
	publisher = {Paradigm Publishing Ltd.,},
	year = {c1987.},
	address = {London :},
	url = {http://www.amazon.com/Intermediate-Systems-Analysis-David-Mason/dp/0948825251/ref=sr_1_1?s=books&ie=UTF8&qid=1415258992&sr=1-1&keywords=0948825251}
}