@book{61142,
	author = {Helms Harry L. and Helms, Harry L.},
	title = {Electronics applications sourcebook Vol-2},
	publisher = {McGraw-Hill,},
	year = {c1986.},
	address = {New York :},
	edition = {1986 ed.},
	note = {http://www.amazon.com/Electronics-applications-sourcebook-Helms/dp/0070279977/ref=sr_1_1?s=books&ie=UTF8&qid=1413622185&sr=1-1&keywords=0070279977  https://www.worldcat.org/title/electronics-applications-sourcebook-vol-1/oclc/442535931&referer=brief_results}
}