TY  - RPRT
TI  - Diatoms and tonsteins as paleoenvironmental and paleodepositional indicators in a Miocene coal bed, Costa Rica.
AU  - J. D. Sanchez
AU  - J.P. Bradbury
AU  - B.F. Bohor
AU  - D. A. Coates
PY  - 1987
DO  - 10.2307/3514643
UR  - https://pubs.usgs.gov/publication/70014787
ID  - 70014787
ER  -