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द्वारा Barker, Mary L.
प्रकाशित 1977 -
Development of resources and of economic opportunity in the Pacific NorthwestReport of the Pacific Northwest regional planning commission to the National resources planning boardBookप्रकाशित 1942
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द्वारा Haig-Brown, Roderick, 1908-1976
प्रकाशित 1961