颁布单位：[University of Alberta] |  颁布时间：1980 |  实施时间：1980 |  学科分类：[Frozen, Ground,, Soil, Stability, in, Permafrost,, Soil, Stability, in, Canada,, North, of, Permafrost, Northern, Canada, Canadian, Arctic, Geology,, Historical, Frozen, Ground, Stratigraphy, Mackenzie, Delta, District, of, Mackenzie,, NW]

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颁布单位：[University of Alberta] |  颁布时间：1973 |  实施时间：1973 |  学科分类：[Permafrost, Engineering, Engineering, in, Frozen, Ground, Frozen, Ground,, Structure, Frozen, Ground,, Composition, Permafrost,, Composition, Canada, Permafrost,, Structure]

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