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Science (New York, N.Y.)|April 30, 1993
Microfossils of the Early Archean Apex chert: new evidence of the antiquity of lifeJ W SchopfProceedings of the National Academy of Sciences of the United States of America|July 19, 1994
Disparate rates, differing fates: tempo and mode of evolution changed from the Precambrian to the PhanerozoicJ W SchopfProceedings of the National Academy of Sciences of the United States of America|June 22, 2000
Solution to Darwin's dilemma: discovery of the missing Precambrian record of lifeJ W SchopfSouth African Journal of Geology : Being the Transactions of the Geological Society of South Africa = Suid-Afrikaanse Tydskrif Vir Geologie : Syndie Die Verhandelinge Van Die Geologiese Vereniging Van Suid-Afrika|January 1, 1991
Collapse of the Late Proterozoic ecosystemJ W SchopfPrecambrian Research|November 1, 1995
Microfossils from the Neoarchean Campbell Group, Griqualand West Sequence of the Transvaal Supergroup, and their paleoenvironmental and evolutionary implicationsW Altermann, J W SchopfScience (New York, N.Y.)|July 9, 1976
Microfossils in conophyton from the soviet union and their bearing on precambrian biostratigraphyJ W Schopf, Y K SovietovJournal of Paleontology|May 1, 1984
Microfossils in stromatolitic cherts from the upper proterozoic Min'yar formation, southern Ural Mountains, USSRA V Nyberg, J W SchopfScience (New York, N.Y.)|July 3, 1987
Early Archean (3.3-billion to 3.5-billion-year-old) microfossils from Warrawoona Group, AustraliaJ W Schopf, B M PackerPageof 2