@book{4250,
	author = {International Astronomical Union and International Astronomical Union Symposium and Bradt, H., ed. and International Astronomical Union},
	title = {X- and gamma-ray astronomy},
	publisher = {D. Reidel Publishing},
	year = {1973},
	series = {IAU Symposium; no. 55},
	address = {Dordrecht}
}