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By: Ladd, H SType: ArticleIn: The veligerVolume: 18Series:Issue:Date: 1975Page Range: 134--138Publication Info: Berkeley, CA, California Malacozoological Society,Subjects:
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By: Abbott, R. Tucker (Robert Tucker), - Ladd, H SType: ArticleIn: Journal of the Washington Academy of SciencesVolume: 41Series:Issue:Date: 1951Page Range: 335--338Publication Info: Washington [etc Washington Academy of Sciences]Subjects:
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By: Ladd, H SType: ArticleIn: Journal of the Washington Academy of SciencesVolume: 42Series:Issue:Date: 1952Page Range: 207--208Publication Info: Washington [etc Washington Academy of Sciences]Subjects: