小黑杨灰斑病流行动态的模糊聚类分析及预测预报的初步研究
许成启 汪太振 郝宏
FUZZY CLUSTERING ANALYSIS OF EPIDEMIC DYNAMICS AND PRELIM NARY STUDY ON THE PREDICTION OF THE GREY SPOT (CORYNEUM POPULINUM BRES) OF POPULUS SIMONII×NIGRA
Xu Chengqi;Wang Taizhen;Hao Hong
林业科学
.
1990, (5): 419
-426
.
