van Dobben, HF 1983: Changes in the epiphytic lichen flora and vegetation in the surroundings of 's-Hertogenbosch (The Netherlands) since 1900. - Nova Hedwigia37: 691-719. [RLL List # 122-20 / Rec.# 4425] Keywords: NETHERLANDS/ EPIPHYTES/ AIR POLLUTION
Abstract: 4 figures. 6 tables. [Air pollution is the probable cause of the decline in the lichen flora from 115 species around 1900 to 46 species detected in 1974.]