@book{51154,
	author = {Bers, Lipman. and John, Fritz,},
	title = {Partial differential equations / },
	publisher = {American Mathematical Society,},
	year = { c1964.},
	series = {Lectures in Applied Mathematics, vol. III},
	address = {Providence, Rhode Island :},
	note = {"American Mathematical Society. Proceedings of the Summer Seminar, Boulder, Colorado 1957."}
}