@book{23999,
	author = {Walther H Ed. and International conference on laser spectroscopy IV (1979 : Tegernsee) and  Rothe K W Ed.},
	title = {Proceeding on laser spectroscopy IV},
	publisher = {Springer-Verlag       },
	year = {1979},
	series = {Springer series in optical sciences; 21},
	address = {Berlin}
}