@book{66,
	author = {Pugh, Emerson M. and Pugh, Emerson W.,},
	title = {Principles of electricity and magnetism /},
	publisher = {Addison-Wesley Pub. Co.,},
	year = {c1960.},
	series = {Addison-Wesley series in physics},
	address = {Reading, Mass. ; London :}
}