1. Avalanche handbook / Ronald I. Perla and M. Martinelli, jr. Perla, Ronald I. Fort Collins, Colo. : Dept. of Agriculture, Forest Service, Rocky Mountain Forest and Range Experiment Station, Alpine Snow and Avalanche Research Project ; Washington : for sale by the Supt. of Docs., U.S. Govt. Print. Off., 1978. Book Physical ReCAP A 1.76:489/2 Loading...