@book {sprengel1825,
	title = {Systema vegetabilium [Caroli Linnaei ... ]},
	volume = {1},
	year = {1825},
	publisher = {Sumtibus Librariae Dieterichianae},
	organization = {Sumtibus Librariae Dieterichianae},
	address = {Gottingae},
	url = {http://www.biodiversitylibrary.org/item/30757},
	author = {Sprengel, Kurt Polycarp Joachim}
}
