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Published in Torreya, in 1927, in volume 27, issue 6, pages 97-98
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Published in Madroño, in 1977, in volume 24, issue 2, pages 68-74
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Published in Journal of The East Africa Natural History Society and National Museum, in 1991, in volume 81, issue 197, pages 1-13
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Published in Biol Bull, in 1953, in volume 105, pages 188-199
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