Back to matchesWe found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitlePeriodicity in extinction: the role of systematicsAuthorsSmith, Andrew B.; Patterson, ColinSubjectsPALEONTOLOGY; TAXONOMYPublicationEcology, 1989, Vol 70, Issue 4, p802ISSN0012-9658Publication typeArticle