1. Metall aus dem Meer;Amann,1973
2. The Third world and the seabed;Amerasinghe,1972
3. Environmental aspects of manganese nodule mining;Amos;Mar. Policy,1977
4. Rohstoff-Versorgung: Ärmste der Welt;Anonymous,1969
5. Questions concerning the establishment of a New International economic order;Anonymous,1974