Loeblich, A. R. & Tappan, H. N. (1941). Some palmate Lagenidae from the Lower Cretaceous Washita Group. Bulletins of American paleontology. 26 (Bulletin 99): 327-356.
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Loeblich, A. R. & Tappan, H. N.
1941
Some palmate Lagenidae from the Lower Cretaceous Washita Group.