@book{23774,
	author = {Heldmann, Karl Christian Wilhelm,},
	title = {Der Kölngau und die civitas Köln.},
	publisher = {M. Niemeyer,},
	year = {1900.},
	address = {Halle a.S.,},
	note = {Pages 1-54 published as "Habilitations-schrift, Universität Halle", Halle a.S., 1899.}
}