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  1. By: Hensen, Victor, - Plankton Expedition
    Publication info: Kiel Lipsius & Tischer 1892-1913
    Holding Institution: Multiple institutions
  2. By: Hansen, H. J. (Hans Jacob), - Deutsche Akademie der Wissenschaften zu Berlin. Humboldt-Stiftung. - Plankton Expedition
    Publication info: Kiel, Lipsius & Tischer, 1895,
    Holding Institution: Smithsonian Libraries and Archives