Listar por autor "Perla, Ronald L."
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Advances in North American avalanche technology: 1972 symposium
Advances in North American Avalanche Technology (USA, Reno : 16-17 Nov. 1972); Perla, Ronald L. (USDA Forest Service. Rocky Mountain Forest and Range Experiment Station, 1973) -
Avalanche handbook
Perla, Ronald L.; Martinelli, M. (USDA Forest Service. Rocky Mountain Forest and Range Experiment Station, 1976)