Marchik, Patricia (1993): Confidence intervals on stratigraphic ranges with time-varying fossilization potential. [University of California, Museum of Paleontology], Berkeley, CA, United States, In: Polly, Paul David (editor), Thordor, Jessica M. (editor), California paleontology conference, 1993, 14 (4, Suppl.), 9-10, georefid:1993-034676

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