Trass, H 1981: Composition and anthropogeneous changes of the lichen flora and vegetation in Estonia. - In: L. Laasimer (ed.): Anthropogeneous Changes in the Plant Cover of Estonia. . Academy of Sciences of the Estonian S. S. R., Tartu pp. 135-153. [RLL List # 112-77 / Rec.# 18929] Keywords: USSR/ ESTONIA/ COMMUNITY ECOLOGY/ CONSERVATION
Abstract: [Lists some recent additions to the lichen flora, an outline of the classification of lichen communities in Estonia, a list of species thought now to be extinct in Estonia, and some thoughts on lichen conservation.]