@book {1328,
	title = {Genera et Species Plantarum Fossilium},
	year = {1850},
	pages = {628},
	publisher = {Wilhelmum Braum{\"u}ller},
	organization = {Wilhelmum Braum{\"u}ller},
	address = {Vindobonae},
	url = {http://books.google.nl/books?id=fSA-AAAAcAAJ},
	author = {Unger, Franz}
}
