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How to Grow Alfalfa

Charles Vancouver PiperHoward Ross TolleyJacob Allen ClarkRoy Elliott CampbellRussell Arthur OakleyThomas Arrington Huntington MillerWilliam Allen OrtonFred Campbell MeierHarvey Leroy WestoverWilliam Joseph Morse

出版	U.S. Department of Agriculture, 1922
URL	http://books.google.com.hk/books?id=TmAujgEACAAJ&hl=&source=gbs_api