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  1. By: Sphon, G G - Lance, J R
    Type: Article
    In: Proceedings of the California Academy of Sciences, 4th series
    Volume: 36
    Series: 4
    Date: 1968
    Page Range: 73--84
    Publication Info: San Francisco California Academy of Sciences
  2. By: Sphon, G G
    Type: Article
    In: The veliger
    Volume: 9
    Date: 1966
    Page Range: 244--246
    Publication Info: Berkeley, CA, California Malacozoological Society,
  3. By: Sphon, G G
    Type: Article
    In: The veliger
    Volume: 13
    Date: 1971
    Page Range: 368--368
    Publication Info: Berkeley, CA, California Malacozoological Society,
  4. By: Mulliner, D K - Sphon, G G
    Type: Article
    In: Transactions of the San Diego Society of Natural History
    Volume: 17
    Date: 1974
    Page Range: 209--216
    Publication Info: [San Diego], The Society, 1905-1989
  5. By: Sphon, G G
    Type: Article
    In: The veliger
    Volume: 12
    Date: 1969
    Page Range: 84--88
    Publication Info: Berkeley, CA, California Malacozoological Society,
  6. By: Sphon, G G - Mulliner, D K
    Type: Article
    In: The veliger
    Volume: 15
    Date: 1972
    Page Range: 147--152
    Publication Info: Berkeley, CA, California Malacozoological Society,