@article {314,
	title = {Neue Entdeckungen im ganzen Umfang der Pflanzenkund},
	volume = {2},
	year = {1821},
	author = {Sprengel}
}
@article {180,
	title = {Dictionnaire des Sciences Naturelles, dans lequel on traite m{\'e}thodiquement des diff{\'e}rens {\^e}tres de la nature, consid{\'e}r{\'e}s soit en eux-m{\^e}mes, d{\textquoteright}apr{\'e}s l{\textquoteright}{\'e}tat actuel de nos connoissances, soit relativement {\`a} l{\textquoteright}utilit{\'e} qu{\'e}n peuvent retirer la m{\'e}decine, l{\textquoteright}agricu},
	volume = {20},
	year = {1821},
	author = {Cassini, H.}
}
@article {52,
	title = {Allg. Encycl.},
	volume = {7},
	year = {1821},
	author = {Spreng.}
}
