@article {1346,
	title = {The Callistuphytaceae (Pteridospermopsida): I. Vegetative structures},
	journal = {Palaeontographica Abtheilung B},
	volume = {151},
	year = {1975},
	month = {05/1975},
	pages = {171-196},
	chapter = {171},
	author = {Rothwell, Gar W.}
}
@article {575,
	title = {Aetophyllum Brongniart 1828, conifer (Non equisetal) from the Voltzia Sandstone (Upper Bunter) of the Vosges (France), a preliminary account},
	journal = {G{\'e}obios},
	volume = {8},
	year = {1975},
	pages = {143-146},
	chapter = {143},
	author = {Grauvogel-Stamm, L. and Grauvogel, L.}
}
