The following bibliography has been generated by bringing together all references provided by our content partners. There may be duplication.

References

  • D. L. Dilcher and T. A. Lott. 2005. Fossil plants from the Union Chapel Mine, Alabama. Pennsylvanian Footprints in the Black Warrior Basin of Alabama
  • Rothwell, G. W. 1988. Cordaitales. In: C. B. Beck (ed.), Origin and Evolution of Gymnosperms. 273-297

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