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  1. By: Stehlin, Hans Georg,
    Publication info: Basel, Georg, 1898
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  2. By: Stehlin, Hans Georg,
    Publication info: Zürich, Druck von Zürcher und Furrer, 1903-
    Holding Institution: Smithsonian Libraries and Archives
    BHL Collections: Unearthed! Smithsonian Libraries' Paleo Collection