TY  - RPRT
TI  - Preliminary palynological zonation of the Chinle formation, southwestern U.S.A., and its correlation to the Newark supergroup (eastern U.S.A.)
AU  - R. J. Litwin
AU  - A. Traverse
AU  - S.R. Ash
PY  - 1991
DO  - 10.1016/0034-6667(91)90028-2
UR  - https://pubs.usgs.gov/publication/70016725
ID  - 70016725
ER  -