TY  - RPRT
TI  - Trace element patterns at a non-marine cretaceous-tertiary boundary
AU  - J. S. Gilmore
AU  - J.D. Knight
AU  - C. J. Orth
AU  - C. L. Pillmore
AU  - R.H. Tschudy
PY  - 1984
DO  - 10.1038/307224a0
UR  - https://pubs.usgs.gov/publication/70013392
ID  - 70013392
ER  -