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Google圖書搜尋
Efficacy of Foliar Applied Urea and Zinc Sulphate on Growth and Fruiting of Ber (Zizyphus Mautitiana Lamk.) Cv-Umran
Surender Singh
出版
Horticulture, CCSHAU, Hisar
, 1992
URL
http://books.google.com.hk/books?id=-yPeYgEACAAJ&hl=&source=gbs_api