TY  - RPRT
TI  - Taxonomic revision of the Spermatopsida of the Oligocene Creede flora, southern Colorado
AU  - Howard E. Schorn
AU  - Jack A. Wolfe
PY  - 1989
DO  - 10.3133/ofr89433
UR  - https://pubs.usgs.gov/publication/ofr89433
ID  - ofr89433
ER  -