@book{4188,
	author = {International Astronomical Union and International Astronomical Union Colloquium and Groth, H. G., ed. and International Astronomical Union},
	title = {Spectrum formation in stars with steady-state extended atmospheres},
	publisher = {U. S. Government Printing Office},
	year = {1970},
	series = {National bureau of standards special publications; 332},
	address = {Washington}
}