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By: Roberts, A WType: ArticleIn: Transactions of the South African Philosophical SocietyVolume: 8Series:Issue:Date: 1890Page Range: 52--62Publication Info: Cape Town, The Society,Subjects:
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By: Roberts, A WType: ArticleIn: Transactions of the South African Philosophical SocietyVolume: 8Series:Issue:Date: 1890Page Range: 93--109Publication Info: Cape Town, The Society,Subjects:
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By: Roberts, A WType: ArticleIn: Transactions of the South African Philosophical SocietyVolume: 8Series:Issue:Date: 1890Page Range: 40--49Publication Info: Cape Town, The Society,Subjects:
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By: Roberts, A WType: ArticleIn: Transactions of the Royal Society of South AfricaVolume: 2Series:Issue:Date: 1910Page Range: 1--7Publication Info: Cape Town, Royal Society of South Africa,Subjects:
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By: Roberts, A WType: ArticleIn: Transactions of the South African Philosophical SocietyVolume: 8Series:Issue:Date: 1890Page Range: 24--32Publication Info: Cape Town, The Society,Subjects: