@book{11449,
	author = {Schaefer, Clemens,},
	title = {Einführung in die theoretische physik :},
	publisher = {W. de Gruyter & co.,},
	year = {1937.},
	address = {Berlin,},
	note = {Vol. 1: 2 aufl. (durchgesehener neudruck) 1927.}
}