@book{32898,
	author = {Dunlap, Carl H. and Siefert, William Alfred,},
	title = {Transformers :},
	publisher = {American Technical Society,},
	year = {c1947.},
	series = {American Technical Society. Electrical series},
	address = {Chicago :},
	note = {"Part of the material ... also appears in Applied electricity cyclopedia."}
}