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No digital objectLibrary / National Library CollectionsUsher, Peter J., 1941-Ottawa :Northern Science Research Group, Dept. of Indian Affairs and Northern Development,1971. [1971]
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No digital objectLibrary / National Library CollectionsP.J. Usher Consulting Services.Yellowknife, N.W.T. :The Committee,1989. [1989]
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No digital objectLibrary / National Library CollectionsUsher, Peter J.Ottawa :Northern Science Research Group, Dept. of Indian Affairs and Northern Development,1969. [1969]
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No digital objectLibrary / National Library CollectionsAitken, James D.[Ottawa]Dept. of Energy, Mines and Resources[1973] [1973]
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No digital objectLibrary / National Library Collections[Ottawa] :Environmental Studies Revolving Funds,©1985. [1985]
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No digital objectLibrary / National Library CollectionsBond, Maurice, 1916-1983.London :H.M.S.O.,1976. [1976]
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No digital objectLibrary / National Library CollectionsUsher, Peter J., 1941-Ottawa :Industrial Division, Dept. of Northern Affairs and National Resources,1966. [1966]
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No digital objectLibrary / National Library CollectionsUsher, Peter J.Ottawa :Northern Science Research Group, Department of Indian Affairs and Northern Development,1971, ©1970. [1971]
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No digital objectLibrary / National Library CollectionsUsher, Peter J.Ottawa,Industrial Division, Dept. of Northern Affairs and National Resources,1966. [1966]
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No digital objectLibrary / National Library CollectionsUsher, Peter J.Ottawa :Northern Science Research Group, Department of Indian Affairs and Northern Development,1971. [1971]
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No digital objectLibrary / National Library CollectionsUsher, Peter J., 1941-Ottawa :Northern Science Research Group, Dept. of Indian Affairs and Northern Development,1969. [1969]
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No digital objectLibrary / National Library CollectionsOttawa :Dept. of Indian Affairs and Northern Development,1968. [1968]
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No digital objectLibrary / National Library CollectionsScace, Robert C., 1942-[Ottawa] :Canadian Environmental Advisory Council,1992. [1992]
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No digital objectLibrary / National Library CollectionsDimitrov, Peter.Ross River, Yukon :[publisher not identified],1984. [1984]
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No digital objectLibrary / National Library CollectionsUsher, Peter J., 1941-Winnipeg :Dept. of Fisheries and Oceans,1991. [1991]
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No digital objectLibrary / National Library CollectionsRoss, D. P.[Saskatoon] :The Office,1992. [1992]
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No digital objectLibrary / National Library CollectionsScace, Robert C., 1942-[Ottawa] :Conseil consultatif canadien de l'environnement,©1992. [1992]
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