Beck, C. B.; Stein, W. E. (1993). Crossia virginiana gen. et sp. nov., a new member of the Stenokoleales from the Middle Devonian of southwestern Virginia. Palaeontographica. Abteilung B, Paläophytologie. 229: 115-134.
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Beck, C. B.; Stein, W. E.
1993
Crossia virginiana gen. et sp. nov., a new member of the Stenokoleales from the Middle Devonian of southwestern Virginia