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  1. By: Hartwick, B - Thorarinsson, G. - Tulloch, L.
    Type: Article
    In: The veliger
    Volume: 21
    Date: 1978
    Page Range: 263--264
    Publication Info: Berkeley, CA, California Malacozoological Society,
  2. By: Hartwick, B - Tulloch, L. - Macdonald, John Denis
    Type: Article
    In: The veliger
    Volume: 24
    Date: 1981
    Page Range: 129--138
    Publication Info: Berkeley, CA, California Malacozoological Society,
  3. By: Hartwick, B
    Type: Article
    In: The veliger
    Volume: 23
    Date: 1981
    Page Range: 254--264
    Publication Info: Berkeley, CA, California Malacozoological Society,