1. Responses of lichens to atmospheric pollution;Anderson,1984
2. A lichenometrical study of the northwestern margin of the Barnes Ice cap—A geomorphological technique;Andrews;Geographical Bulletin (Ottawa),1964
3. Recent glacial history of an alpine area in the Colorado Front Range, USA;Benedict;J. Glaciology,1967
4. Phytotoxische immissionen;Berge,1963
5. Lichenometrical studies in West Greenland;Beschel;Arctic,1958