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Regression Estimation of Leaf Area for Clones of Populus tomentosa
Zhao Yan1, DongWenyi1 , Li Jiyue1,2, Shen Yingbai3 , Zhang Zhiyi3
Chinese Agricultural Science Bulletin . 2010, (12): 94 -97 .  DOI: 10.11924/j.issn.1000-6850.2010-0430