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  1. By: Robinson, Moncure
    Type: Article
    In: Proceedings of the American Philosophical Society held at Philadelphia for promoting useful knowledge
    Volume: 21
    Issue: 114
    Date: 1883
    Page Range: 241--263
    Publication Info: Philadelphia, American Philosophical Society,
  2. By: Robinson, Moncure
    Type: Article
    In: Proceedings of the American Philosophical Society held at Philadelphia for promoting useful knowledge
    Volume: 19
    Issue: 107
    Date: 1880
    Page Range: 28--37
    Publication Info: Philadelphia, American Philosophical Society,