Ralph E. Heal

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T. Wallace, and Ordway Starnes: A Survey of Plants for Insccticidal Activity, Lloydia, volume IS, pages 8g-i62, 1950. . Martin Jacob son: Herculin, A Pungent Insccticidal Constituent of Southern Prickly Ash Bark, The Journal of the American Chemical Society, volume yo, pages 42344237, 194S. F. B. LaForge: Constituents of Pyrethrum Flowers. XX. The Partial(More)
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