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Google圖書搜尋
Resistance to Snow Blight (Phacidium Infestans Karst.) in Different Provenances of Pinus Silvestris L.
Erik Björkman
出版
Skogshögskolan
, 1963
URL
http://books.google.com.hk/books?id=JhrUPmAbJfYC&hl=&source=gbs_api