【序号】:1 【作者】:Sepkoski,Jr. J. J. 【题名】:Periodicityin extinction and the problem of catastrophism in the history of life 【期刊】: Journalof the Geological Society 【年、卷、期、起止页码】:1989,v. 146, p. 7-19 【全文链接】:http://jgs.geoscienceworld.org/cgi/content/abstract/146/1/7