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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Weitzman, Sidney, - Bay, Roger R. (Roger Rudolph),
    Publication info: [St. Paul], Lake States Forest Experiment Station, Forest Service, U.S. Department of Agriculture, 1963
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
    Subjects: Forest management  Forest soils  Frost  Minnesota  Soil freezing  
  1. By: Díaz-Miguel, M - Castro, J. (Jorge) - García, P. A.
    Type: Article
    In: Phyton (Buenos Aires)
    Date: 2014-12-01
    Publication Info: Phyton (Buenos Aires)
    Subjects: Germination  High-mountain plant species  Plantgrowth regulators  Ski-slope restoration  Soil freezing