TY  - JOUR
A1  - Meek, F. B.
A1  - Worthen, A. H.
JO  - Geological Survey of Illinois
C1  - 3: 291-565, pls. 1-20
TI  - Geology and Palaeontology. Part II. Palaeontology
UR  - https://molluscabase.org/aphia.php?p=sourcedetails&id=490928
PY  - 1868
Y2  - 2026-06-13
ER  -