VDI 3957 Blatt 13-2005
通过地衣(生物指示)确定和评估环境空气污染物影响的生物测量程序 绘制附生地衣的多样性作为空气质量的指标
Biological measurement procedures for determining and evaluating the effects of ambient air pollutants by means of lichens (bioindication) - Mapping the diversity of epiphytic lichens as an indicator of air quality