南京林业大学学报（自然科学版）
A Preliminary Study on a Pair-Needle Method for Measuring the Net Assimilation Rate of Pine Needles
Xiong Wenyu
JOURNAL OF NANJING FORESTRY UNIVERSITY . 1979, (07): 152 -155 .  DOI: 10.3969/j.jssn.1000-2006.1979.07.018

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