南京林业大学学报（自然科学版）
GEOGRAPHIC VARIATION AND GENETIC PARAMETERS OF COTTONWOOD FROM THE SOUTHERN UNITED STATES
Tang Zhenmin
JOURNAL OF NANJING FORESTRY UNIVERSITY . 1990, (03): 15 -21 .  DOI: 10.3969/j.jssn.1000-2006.1990.03.004

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