Edvardsson, Sverre Underground powerhouses and high pressure tunnels - Trondheim : Norwegian University of Science and Technology, 2002 - 99p. : ill. ; 30cm. - Hydropower development; Vol.14 . ISBN: 8275980291 Subjects--Topical Terms: Electric power transmissionHydroelectric power plants LC Class. No.: WRE QTO TK1081.H92