TY  - RPRT
TI  - Taxonomic revision of the Spermatopsida of the Oligocene Creede flora, southern Colorado
AU  - Jack A. Wolfe
AU  - Howard E. Schorn
PY  - 1990
DO  - 10.3133/b1923
UR  - https://pubs.usgs.gov/publication/b1923
ID  - b1923
ER  -