@book{86802,
	author = {Kayser, Emanuel.},
	title = {Lehrbuch der Allgemeinen Geologie / },
	editor = {Union Deutsche Verlagsgesellschaft)},
	publisher = {Ferdinand Enke, },
	year = {1921 (},
	address = {Stuttgart : },
	edition = {2. bde., 6. verm. aufl.}
}