@article {479,
	title = {Jahrbuch f{\"u}r Practische Pharmacie und Verwandte Facher. Kaiserlautern},
	volume = {4},
	year = {1841},
	author = {Schultz Bipontinus}
}
@article {446,
	title = {Transactions of the American Philosophical Society Held at Philadelphia for Promoting useful Knowledge},
	volume = {ser. 2, 7},
	year = {1841},
	author = {Nuttal}
}
@article {248,
	title = {Journal of Botany, British and Foreign. London},
	volume = {3},
	year = {1841},
	author = {Hooker, W.J. and Arnott, G.}
}
@article {246,
	title = {Journal of botany by William Jackson Hooker},
	volume = {3},
	year = {1841},
	author = {Hooker, W.J.}
}
