主成分分析法在SPSS中的应用——以文峪河河岸带林下草本群落为例
주성분분석법재SPSS중적응용——이문욕하하안대림하초본군락위례
The Application of the Principle Components Analysis in SPSS——Taking the Herbage Community under Forest in the Riparian Zone of Wenyuhe River as the Example