TY  - RPRT
TI  - Late Cenozoic stages and molluscan zones of the U.S. Middle Atlantic Coastal Plain
AU  - B. W. Blackwelder
PY  - 2017
DO  - 10.1017/s0022336000061862
UR  - https://pubs.usgs.gov/publication/70011904
ID  - 70011904
ER  -