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Annual Report of the Director of the Experiment Station on Work Done Under the Local Experiment Law in 1919

Alabama Polytechnic Institute. Agricultural Experiment StationJohn Frederick Duggar

出版	Alabama Agricultural Experiment Station of the Alabama Polytechnic Institute, 1920
URL	http://books.google.com.hk/books?id=Wqg_GwAACAAJ&hl=&source=gbs_api