Hosticka, H.E.; Daum, C.R.. 1950. "Measurement of Effects on the Gorge Powerhouse and its Equipment and its Equipment and Tunnels During Blasting in the Adjacent Rock for the Department of Lighting, City of Seattle, Washington". Bureau of Reclamation, Report Number HYD-424.
Web Link: ../pubs/HYD/HYD-424.pdf
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