Trilobites, Biostratigraphy, and Lithostratigraphy of the Crepicephalus and Aphelaspis zones, Lower Deadwood formation (Marjuman and Steptoean Stages, Upper Cambrian), Black Hills, South Dakota

J. H. Stitt, and P.J. Perfetta

2000

Article

Journal of Paleontology 74(2):199-223

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