Title: Biblio RTF Export
Author: Biblio 7.x

H.  Krog, ?The Macrolichens of Alaska?, Norsk polarinstitutt, vol. Skrifter, p. 180, 1968.

E.  Dahl and Krog, H., Macrolichens of Denmark, Finland, Norway and Sweden. Universitetsforlaget, 1973, p. 185.

T. D. V.  Swinscow and Krog, H., Macrolichens of East Africa. Dorchester: Henry Ling Ltd, The Dorset Press, 1988.