Development Stages, Future Trend and Enlightenmentf USA’s Agricultural Policies
GUO Wen-shuai1§, WANG Jing-yi2§, CHEN Jue-ying2, LIU He-guang2*
Journal of Agricultural Science and Technology . 2016, (6): 9 -15 .  DOI: 10.13304/j.nykjdb.2016.652

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