Torpen, B. E. Power and Columbia River storage: Projects in the region's potential. [An address given Dec. 12, 1951.].
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रTorpen, Bernhardt E. Power and Columbia River Storage: Projects in the Region's Potential. [An Address Given Dec. 12, 1951.]. n.p.
एमएलए (8वां संस्करण) प्रशस्ति पत्रTorpen, Bernhardt E. Power and Columbia River Storage: Projects in the Region's Potential. [An Address Given Dec. 12, 1951.].
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