TY - RPRT TI - Mineralogic evidence for an impact event at the Cretaceous-Tertiary boundary AU - B.F. Bohor AU - E.E. Foord AU - P.J. Modreski AU - Don M. Triplehorn PY - 1984 DO - 10.1126/science.224.4651.867 UR - https://pubs.usgs.gov/publication/70014029 ID - 70014029 ER -