TY  - RPRT
TI  - Vegetation, climatic and floral changes at the Cretaceous-Tertiary boundary
AU  - J. A. Wolfe
AU  - G.R. Upchurch
PY  - 1986
DO  - 10.1038/324148a0
UR  - https://pubs.usgs.gov/publication/70014490
ID  - 70014490
ER  -