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No digital objectLibrary / National Library CollectionsRoy, J. L.Ottawa :Information Canada,1972. [1972]
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No digital objectLibrary / National Library CollectionsRoy, J. L.Ottawa :Information Canada,1972. [1972]
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No digital objectLibrary / National Library CollectionsIrving, E.[Ottawa] :[Energy, Mines and Resources Canada, Earth Physics Branch],[1972] [1972]
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No digital objectLibrary / National Library CollectionsYamasaki, R. S.Ottawa :Division of Building Research, National Research Council,1972. [1972]
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No digital objectLibrary / National Library CollectionsHewitt, R. L. (Roy Lawrence)Ottawa :National Research Council Canada,1972. [1972]
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No digital objectLibrary / National Library Collections[Lieu de publication non identifié] :Secrétariat d'Etat,1972] [1972]
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