TY  - RPRT
TI  - A detailed taxonomy of Upper Cretaceous and lower Tertiary Crassatellidae in the eastern United States: An example of the nature of extinction at the boundary
AU  - G. Lynn Wingard
PY  - 1993
DO  - 10.3133/pp1535
UR  - https://pubs.usgs.gov/publication/pp1535
ID  - pp1535
ER  -