TY  - RPRT
TI  - Biodiversity changes in Cretaceous palynofloras of eastern Asia and western North America
AU  - D. J. Nichols
PY  - 2003
DO  - 10.1016/s1367-9120(02)00091-3
UR  - https://pubs.usgs.gov/publication/70025407
ID  - 70025407
ER  -