Zong X (2006). “Approach to Estimating the Agricultural Mechanization Contribution Rate by Two Models in the DEA Method.” Transactions of the Chinese Society of Agricultural Engineering 22(5): 20-23.

Zong X (2006). “Approach to Estimating the Agricultural Mechanization Contribution Rate by Two Models in the DEA Method.” Transactions of the Chinese Society of Agricultural Engineering 22(5): 20-23.

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