@book {19993,
	title = {Die Angiospermen des Bernsteins},
	series = {Die Flora des Bernsteins},
	volume = {2},
	year = {1886},
	publisher = {Wilhelm Engelmann},
	organization = {Wilhelm Engelmann},
	address = {Leipzig},
	url = {http://www.biodiversitylibrary.org/item/73400$\#$page/149/mode/1up},
	author = {Conwentz, Hugo}
}
