@book {4100,
	title = {Catalogue of North American Plants North of Mexico, exclusive of the lower Cryptogams},
	year = {1898},
	month = {1898///},
	pages = {5},
	publisher = {University of Minnesota (?)},
	organization = {University of Minnesota (?)},
	address = {Minneapolis (?)},
	author = {Heller, A. A.}
}
@article {3433,
	title = {New combinations - XI},
	journal = {Muhlenbergia},
	volume = {9},
	year = {1913},
	month = {1913///},
	pages = {67 - 68},
	author = {Heller, A. A.}
}
