![CORRESPONDENCE. PRESENT TRENDS IN THE DESIGN OF PRESSURE TUNNELS AND SHAFTS FOR UNDERGROUND HYDRO-ELECTRIC POWER STATIONS]()
CORRESPONDENCE. PRESENT TRENDS IN THE DESIGN OF PRESSURE TUNNELS AND SHAFTS FOR UNDERGROUND HYDRO-ELECTRIC POWER STATIONSJAEGER, C; KNAPP, F H; HAGRUP, J F; CHATHAM, C G; TALOBRE, J; FERRAZ, O M; TERRISSE, A; LAWTON, F L; HARRIS, A J; COLEBATCH, G T; HUTTER, A; HANIMANN, J; JUDD, S; BRICKEY, H K; LIPPOLD, F H; FREY-BAER, O · Proceedings of the Institution of Civil Engineers · 1955