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Pennell, Vivian I.; Knight, Howard; Nixon, Mary

doi:10.2307/4438017

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Research Article| February 01 1949

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Vivian I. Pennell,

Vivian I. Pennell

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Howard Knight,

Howard Knight

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Mary Nixon

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The American Biology Teacher (1949) 11 (2): 52–53.

https://doi.org/10.2307/4438017

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