@book{7026249,
	author = {Коваленков, В.И.},
	title = {Основы теории электромагнитных цепей},
	publisher = {Стеклогр. ЛЭИИСС},
	year = {1939},
	address = {Ленинград},
	note = {Стеклогр. изд.}
}