@book{53048,
	author = {Harper, Charlie,},
	title = {Introduction to mathematical physics /},
	publisher = {Prentice-Hall,},
	year = {c1976 [printing 2003].},
	series = {Prentice-Hall physics series.},
	address = {Englewood Cliffs, N.J. :},
	note = {Includes index.}
}