INTERNATIONAL GEOLOGICAL CONGRESS, 26, 1980: General geology of the Federal Republic of Germany with two excursions to industrial mineral rocks and environmental research. Ed. by Gerd W. Lüttig. Stuttgart 1980, 95 s., ill., 27 cm, DM 46,-. E. Schweizerbart,sehe Verlagsbuchhandlung. - Hansen, Kaj (Geografisk Tidsskrift, 1981)