The Bug Creek problem and the Cretaceous-Tertiary transition at McGuire Creek, Montana / Donald L. Lofgren. Lofgren, Donald L., 1950- Vertebrates, Fossil Montana McGuire Creek Region (McCone County) Cretaceous-Tertiary boundary Montana McGuire Creek Region (McCone County) Paleontology, Stratigraphic. QE734.5 .L64 1995 566.0978626 20 LOB Includes bibliographical references. Berkeley : University of California Press, 1995. 1995. 1995 Text xii, 185 p. : eng University of California publications in geological sciences ; v. 140 University of California publications in geological sciences ; v. 140. Montana McGuire Creek Region (McCone County) Montana McGuire Creek Region (McCone County)