@article {471,
	title = {THUCYDIACEAE Fam. nov., with a review and reevaluation of paleozoic walchian conifers},
	journal = {International Journal of Plant Sciences},
	volume = {162},
	year = {2001},
	pages = {1155-1185},
	chapter = {1155},
	url = {http://oak.cats.ohiou.edu/~gh339591/pdf/pdf3.pdf},
	author = {Hernandez-Castillo, Genaro R. and Rothwell, Gar W. and Mapes, Gene}
}
