Author: Leary, R.L., & Pfefferkorn, H.W., 1977.:
Title: An Early Pennsylvanian flora with Megalopteris and Noeggerathiales from West-Central Illinois.
Description: [Illinois St. Geol. Surv. Circ., 500.] Urbana, Ill. 8vo. Pp. [ii],78, many photos on 15 pls., 13 figs., 8 tabs., refs. Orig. wrs.

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