@article {596,
	title = {Permineralized ovulate cones of Lebachia from Late Palaeozoic limestones of Kansas},
	journal = {Palaeontology},
	volume = {27},
	year = {1984},
	pages = {69-94},
	chapter = {69},
	author = {Mapes, Gene and Rothwell, Gar W.}
}
@article {501,
	title = {Cordaixylon dumusum n.sp. (Cordaitales). I. Vegetative Structures},
	journal = {Botanical Gazette},
	volume = {145},
	year = {1984},
	pages = {275-291 },
	chapter = {275},
	url = {http://www.jstor.org/pss/2474349},
	author = {Rothwell, Gar W. and Warner, Susan}
}
