@book{6688,
	author = {DuChateau, Paul. and Zachmann, David W.},
	title = {Schaum's outline of theory and problems of partial differential equations /},
	publisher = {McGraw-Hill,},
	year = {c1986.},
	address = {New York :},
	note = {includes index},
	url = {http://www.loc.gov/catdir/description/mh022/85024156.html}
}