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Harvesting Pyrethrum. By A.F. Sievers ... M.S. Lowman ... and W.M. Hurst
Arthur Frederic SIEVERS
, Wilbur Magruder HURST
, Morris Samson LOWMAN
· 1941
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Plants for Insecticides and Rodenticides
Arthur Frederic Sievers
· 1943
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Production of Drug and Condiment Plants
Arthur Frederick Sievers
· 1948
