@book{19351,
	author = {Standley, Paul L. and Dahlgren, B. E.},
	title = {The Rubiaceae of Venezuela},
	publisher = {Field Museum of Natural History, },
	year = {1930.},
	address = {Chicago:},
	url = {http://ia902608.us.archive.org/18/items/rubiaceaeofvenezfistan/rubiaceaeofvenezfistan.pdf}
}