1. Lagenospermum imparirameum sp. nov., a seedbearing fructification from the Mississippian of Pennsylvania and Virginia;Arnold;Bull. Torrey Bot. Club,1939
2. Anatomy of the Lower Mississippian delta in southwestern Virginia;Bartlett,1974
3. Prodrome d'une histoire des végétaux fossiles;Brongniart;Dictionnaire Sci. Nat.,1828
4. An illustrated key to the commoner British Upper Carboniferous plant compression fossils;Chaloner,1975
5. The Distribution of Late Palaeozoic Floras;Chaloner;Spec. pap. Palaeontol.,1973