The characteristics of stable carbon isotope and water use efficiency for Populus tomentosa hybrid clones
FANG Xiaojuan, LI Jiyue, NIE Lishui, SHEN Yingbai, ZHANG Zhiyi
Ecology and Environment . 2009, (6): 2267 -2271 .  DOI: 10.16258/j.cnki.1674-5906(2009)06-2267-05

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