Extinctions of life.
Sepkoski
J J
JJ
Department of Geophysical Sciences, University of Chicago, USA.
D000818:Animals; D005075:Biological Evolution; D018534:Earth, Planet; D005580:Fossils; D055593:Geological Phenomena; D005844:Geology; D008386:Marine Biology; D019110:Meteoroids; D010163:Paleontology