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• Volume 42,
• R. A. Rankin
• DOI: https://doi.org/10.2307/3608356

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• Volume 42,
• R. A. Rankin
• DOI: https://doi.org/10.2307/3608356

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• Volume 42,
• R. A. Rankin
• DOI: https://doi.org/10.2307/3608356