A new species of Aulacotheca (Pteridospermales) from the Middle Pennsylvanian of Iowa

12 3 Wed, 01/01/1969 - 12:00 September 414 419

EGGERT, D. A., KRYDER, R. W. 1969. A new species of Aulacotheca (Pteridospermales) from the Middle Pennsylvanian of Iowa. Palaeontology, 12, 3, 414–419.

Donald A. Eggert and Ralph W. Kryder The Palaeontological Association (Free Access)