@book {8514,
	title = {Revision of the genus Coreopsis},
	year = {1936},
	month = {1936///},
	publisher = {Publ. Field Mus. Nat. Hist., Bot. Ser. 11},
	organization = {Publ. Field Mus. Nat. Hist., Bot. Ser. 11},
	author = {E.E. Sherff}
}
@book {8515,
	title = {The genus Bidens},
	year = {1937},
	month = {1937///},
	publisher = {Publ. Field Mus. Nat. Hist., Bot. Ser. 16},
	organization = {Publ. Field Mus. Nat. Hist., Bot. Ser. 16},
	author = {E.E. Sherff}
}
@article {7661,
	title = {Revision of the genus Cosmos},
	journal = {Field Mus. Nat. Hist},
	volume = {8},
	year = {1932},
	month = {1932///},
	pages = {401 - 447},
	author = {E.E. Sherff}
}
