TY  - RPRT
TI  - Palynology and palynostratigraphy of the Hell Creek Formation in North Dakota: A microfossil record of plants at the end of Cretaceous time
AU  - Douglas J. Nichols
PY  - 2002
DO  - 10.1130/0-8137-2361-2.393
UR  - https://pubs.usgs.gov/publication/70221501
ID  - 70221501
ER  -