TY  - RPRT
TI  - Multiple microtektite horizons in upper Eocene marine sediments: No evidence for mass extinctions
AU  - G. Keller
AU  - Steven L. D’Hondt
AU  - T.L. Vallier
PY  - 1983
DO  - 10.1126/science.221.4606.150
UR  - https://pubs.usgs.gov/publication/70011256
ID  - 70011256
ER  -