Pitman, G.T.K. 1972. A Lichenometrical Study of Snow Patch Variation in the Frederikshåb District, South-West Greenland, and its Implications for Studies of Climatic and Glacial Fluctuations. Meddelelser om Grønland. 192, 7 (sep. 1972), 32 pp. DOI:https://doi.org/10.7146/mog.v192.150072.