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Masamu Aniya, Hiroaki Sato, Renji Naruse, Pedro Skvarca, Gino Casassa, Recent Glacier Variations in the Southern Patagonia Icefield, South America, Arctic and Alpine Research, Vol. 29, No. 1 (Feb., 1997), pp. 1-12
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Aniya et al. (1997) studied this question.
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