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Research Bulletin

Bernice Marie Schmitz KorschgenCarl David SettergrenCecil L. GregoryCharles Wesley TurnerJoseph Charles HeadleyKeith E. SaxtonRodney Dwain Horrocks

出版	University of Missouri-Columbia, College of Agriculture, Agricultural Experiment Station, 1969
URL	http://books.google.com.hk/books?id=09lPAQAAMAAJ&hl=&source=gbs_api