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Tannin Content and Other Characteristics of Native Sumac in Relation to its Value as a Commercial Source of Tannin
Clarke, Ira D., (1949)
Commercial Possibilities of Japanese Mint in the United States as a Source of Natural Menthol
Sievers, A. F., (1933)
Studies on the Possibilities of Devil's Shoestring (Tephrosia Virginiana) and Other Native Species of Tephrosia as Commercial Sources of Insecticides
Sievers, A. F., (1938)