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  1. By: Yochelson, Ellis L. (Ellis Leon), - Fedonkin, M. A. (Mikhail Aleksandrovich)
    Publication info: Washington, D.C, Smithsonian Institution Press, 1993
    Holding Institution: Smithsonian Libraries and Archives
    Subjects: Cambrian  Climactichnites  Paleontology  
    BHL Collections: Unearthed! Smithsonian Libraries' Paleo Collection