TY  - SER
AU  - Keller,G
AU  - Barrera,E
AU  - Schmitz,B
AU  - Mattson,E
TI  - Gradual mass extinction, species survivorship, and long-term environmental changes across the Cretaceous-Tertiary boundary in high latitudes
SN  - 00167606
N1  - bibliogr. p. 997
ER  -