Ahlmann, Hans Wilhelmsson, 1889- Glacier variations and climatic fluctuations / by H. W. Son Ahlmann. - New York : American Geographical Society, 1953. - v, 51 p. : ill., maps. ; 23 cm. - Bowman memorial lectures. . Bibliographical references includes in'Footnotes' (p. 44-51) Subjects--Topical Terms: Glaciers.Climatology.