TY  - RPRT
TI  - Late Frasnian mass extinction: Conodont event stratigraphy, global changes, and possible causes
AU  - Sandberg, Charles A.
AU  - Ziegler, Willi
AU  - Dreesen, Roland
AU  - Butler, Jamie L.
PY  - 1988
UR  - https://ntrs.nasa.gov/citations/19890012009
ID  - 19890012009
ER  -