@book{2569,
	author = {Koch, Hans,},
	title = {Der schwarze Schumacher (der harten- und lindenhandel in Zug) 1728-1736.},
	publisher = {E. Kalt-Zehnder,},
	year = {1940.},
	address = {Zug,},
	note = {Issued also as dissertation, Zürich, under title: Der harten- und lindenhandel in Zug, 1728-1736.}
}