南京林业大学学报（自然科学版）
A Study on the Relationship between Crown Index and Seed Yield in Chinese Fir Orchard
FANG Le jin
JOURNAL OF NANJING FORESTRY UNIVERSITY . 2000, (05): 53 -55 .  DOI: 10.3969/j.jssn.1000-2006.2000.05.014

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