@book{31935,
	author = {Slurzberg, Morris. and Osterheld, William,},
	title = {Essentials of communication electronics /},
	publisher = {McGraw-Hill,},
	year = {c1973.},
	address = {New York :},
	edition = {3d ed.},
	note = {First ed. published in 1948 under title: Essentials of radio.}
}