@book{17033,
	author = {Ahn, F. and Fischer, Gustavus.},
	title = {Ahn's method of learning the German language /},
	publisher = {E. Steiger,},
	year = {1873, c1871.},
	address = {New York :},
	edition = {5th ed.},
	note = {V.2. Second (theoretical) course: 2nd ed., 1871 has separate title page.}
}