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Evaluation of Labour Under Manual and Mechanized Practices for Potato Production in Jordan Valley \\ Jordan Journal of Agricultural Sciences .- 2012, Vol. 8, No. 4, Pp. 614-627

Bassam Al-Qarallah

出版	University of Jordan, 2012
URL	http://books.google.com.hk/books?id=KMQfnQAACAAJ&hl=&source=gbs_api