@inbook {471,
	title = {Heliotropium},
	booktitle = {Handbuch der Bl{\"u}tenbiologie},
	volume = {III/2},
	year = {1905},
	month = {1905///},
	pages = {64 - 64},
	publisher = {W. Engelmann},
	organization = {W. Engelmann},
	address = {Leipzig},
	url = {http://biodiversitylibrary.org/page/19438095},
	author = {Knuth, P.},
	editor = {Knuth, P.}
}
