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Ground Cornstalks and Cobs as Base Materials and Magnesium Sulphate and Sodium Fluosilicate as Poisons in Grasshopper Baits

Raymond Roberts

出版	University of Nebraska, College of Agriculture, Experiment Station, 1937
URL	http://books.google.com.hk/books?id=9EknAQAAMAAJ&hl=&source=gbs_api