@book{277,
	author = {Braun, Gerhard.},
	title = {Planning and engineering of shortwave links /},
	publisher = {Wiley,},
	year = {1986.},
	address = {[S.l.] :},
	edition = {2nd ed.},
	url = {http://www.amazon.com/exec/obidos/ASIN/0471908681/chopaconline-20}
}