1. Cobalt, Nickel and Manganese, Future Supply and Demand and Implications for Deep Seabed Mining;Antrim,1978
2. Prospect for the exploitation of manganese nodules: the main technical, economic and legal problems;Archer,1976
3. Resources and potential reserves of nickel and copper in manganese nodules;Archer,1979
4. French exploration seeks to define minable nodule tonnages on Pacific floor;Bastien-Thiry;Eng. Min. J.,1977
5. Manganese, Mineral Commodity, Profile 7, July, 1979;De Huff,1979