Fluctuations of the glaciers from the 1970s to 1989 in the Khumbu, Shorong and Langtang regions, Nepal Himalayas T. Yamada, T. Shiraiwa, H. Iida, T. Kadota, T. Watanabe, B. Rana, Y. Ageta and H. Fushimi:11-20 掲載号: BGR Vol. 10 (1992)