Hartman, J.H. (1998). The biostratigraphy and paleontology of latest Cretaceous and Paleocene freshwater bivalves from the western Williston Basin, Montana, U.S.A. In: Johnston, P.A. & Haggart, J.W. Bivalves: an eon of evolution. Calgary, University of Calgary Press, 317-345.
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Hartman, J.H.
1998
The biostratigraphy and paleontology of latest Cretaceous and Paleocene freshwater bivalves from the western Williston Basin, Montana, U.S.A.
In: Johnston, P.A. & Haggart, J.W. Bivalves: an eon of evolution. Calgary, University of Calgary Press, 317-345