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  1. By: Hegner, Robert William,
    Publication info: New York, Macmillan, 1914
    Holding Institution: University of Toronto - Gerstein Science Information Centre
    Subjects: Germ cells  
  2. By: Hegner, Robert William,
    Publication info: New York, The Macmillan company, 1914
    Holding Institution: MBLWHOI Library
    Subjects: Germ cells  physiology  ultrastructure  
  3. By: Hegner, Robert William,
    Publication info: New York, The Macmillan company, 1914
    Holding Institution: University of California Libraries
    Subjects: Cell Cycle  Germ cells  physiology  ultrastructure  
  4. By: Weismann, August,
    Publication info: New York, Scribner, 1893
    Holding Institution: University of Toronto - Gerstein Science Information Centre
    Subjects: Germ cells  Heredity