l. h. (2009). "Norges Geologi. By Olaf Holtedahl. 2 vols., 1118 pp., with 485 text-figures, 24 plates, including two maps in colour—a geological map and a glacial map, scale 1/1 million. Norges Geologiske Undersøkelse, Nr. 164, Oslo, 1953. Price 70 kroner". Geological Magazine. 92: 87–88. doi:10.1017/S0016756800063366.