@book{4847,
	author = {Kennard, E. H., Jt. Auth.; (Cooper, John N.), Jt. and Richtmyer, F. K.},
	title = {Introduction to modern physics},
	publisher = {Tata McGraw-Hill Publishing Company Limited,},
	year = {1969},
	address = {New Delhi,India:},
	edition = {6ht}
}