Fristrup., B. 1954. Glacier Variations and Climatic Fluctuations. H. W: son Ahlmann Bowman Memorial Lectures, Series 3. New York: American Geographical Society, 1953. V + 51 sider, illustrationer og diagrammer. 15X19 cm. 2,50 $. Geografisk Tidsskrift. 53, (jan. 1954).