@book{64610,
	author = {Price, Arnold Hereward},
	title = {The evolution of the Zollverein},
	publisher = {University of Michigan Press},
	year = {1949.},
	series = {University of Michigan publications. History and political science. v. 17},
	address = {Ann Arbor},
	note = {Published also as thesis (PH. D.) - University of Michigan.}
}