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Origin, Interrelation & Properties of Ringspot Strains of Virus X in American Potato Varieties

R. C. LadeburgRussell Harold LarsonJohn Charles Walker

出版	Agricultural Experiment Station, University of Wisconsin, 1950
URL	http://books.google.com.hk/books?id=YY-XQbPnWuwC&hl=&source=gbs_api