@book{2637,
	author = {Norwood, Joseph},
	title = {Twentieth century physics },
	publisher = {Prentice-Hall },
	year = {1976},
	series = {(Prentice-Hall physics series, ed by Francis, Pipkin M. and George, Snow A).},
	address = {New Jersey},
	note = {Bibliog at the end of each chap. }
}