@book {5816,
	title = {Manual of the botany of the northern United States: including Virginia, Kentucky, and all east of the Mississippi},
	year = {1856},
	month = {1856},
	pages = {1 - 739},
	publisher = {George P. Putnam \& Co.},
	organization = {George P. Putnam \& Co.},
	address = {New York},
	author = {Gray, A.}
}
@article {5762,
	title = {Contributions to the botany of North America},
	journal = {Proceedings of the American Academy of Arts and Sciences},
	volume = {12},
	year = {1876},
	month = {1876},
	pages = {51 - 85},
	author = {Gray, A.}
}
@article {4106,
	title = {Contributions to the botany of North America},
	journal = {Proc. Amer. Acad. Arts},
	volume = {20},
	year = {1885},
	month = {1885///},
	pages = {257 - 310},
	author = {Gray, A.}
}
@article {4097,
	title = {Botanical contributions},
	journal = {Proceedings of the American Academy of Arts and Sciences},
	volume = {15},
	year = {1879},
	month = {1879///},
	pages = {25 - 52},
	author = {Gray, A.}
}
@article {3415,
	title = {Characters of new plants of California and elsewhere, principally of those collected by H. N. Bolander in the State Geological Survey},
	journal = {Proceedings of the American Academy of Arts and Sciences},
	volume = {7},
	year = {1868},
	month = {1868///},
	pages = {327 - 401},
	author = {Gray, A.}
}
@article {2727,
	title = {Characters of a new genus consisting of two species of parasitic Gentianeae},
	journal = {J. Linn. Soc., Bot.},
	volume = {11},
	year = {1871},
	month = {1871///},
	pages = {22 - 23},
	author = {Gray, A.}
}
