https://catalogue-scientifique.canada.ca/record=4080923~S6*frc
Rechercher Morris, Melvin S; Rechercher Schmautz, Jack E; Rechercher Stickney, Peter F; Rechercher Janda, C. V
Montana Forest and Conservation Experiment Station, Montana State University and Intermountain Forest and Range Experiment Station, Forest Service, U.S. Department of Agriculture, décembre 1962
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