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By: Hobbs, William HerbertType: ArticleIn: Proceedings of the American Philosophical Society held at Philadelphia for promoting useful knowledgeVolume: 48Series:Issue: 192Date: 1909Page Range: 259--302Publication Info: Philadelphia, American Philosophical Society,Subjects:
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By: Hobbs, William HerbertType: ArticleIn: Proceedings of the American Philosophical Society held at Philadelphia for promoting useful knowledgeVolume: 54Series:Issue: 218Date: 1915Page Range: 185--225Publication Info: Philadelphia, American Philosophical Society,Subjects:
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By: Hobbs, William HerbertType: ArticleIn: Proceedings of the American Philosophical Society held at Philadelphia for promoting useful knowledgeVolume: 60Series:Issue: 220Date: 1921Page Range: 34--42Publication Info: Philadelphia, American Philosophical Society,Subjects: