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  1. By: Fraenkel, Gottfried S. (Gottfried Samuel), - Žďárek, Jan
    Type: Article
    In: The Biological bulletin
    Volume: 139
    Date: 1970-08-01
    Page Range: 138--150
    Publication Info: Woods Hole, Mass Marine Biological Laboratory
  2. By: Fraenkel, Gottfried S. (Gottfried Samuel), - Žďárek, Jan - Sivasubramanian, P
    Type: Article
    In: The Biological bulletin
    Volume: 143
    Date: 1972-08-01
    Page Range: 127--139
    Publication Info: Woods Hole, Mass Marine Biological Laboratory
  3. By: Žďárek, Jan - Slama, K
    Type: Article
    In: The Biological bulletin
    Volume: 142
    Date: 1972-04-01
    Page Range: 350--357
    Publication Info: Woods Hole, Mass Marine Biological Laboratory