Sea-bed mining (1977-1979)

Eitemau Tebyg

• Sea-bed mining of manganese nodules, II : 1977-1979
  gan: British Ship Research Association
• Analysis of exploration and mining technology for maganese nodules
  Cyhoeddwyd: (1984)
• Ocean mining
  gan: British Ship Research Association
  Cyhoeddwyd: ([197)
• Cashing in on the ocean [kasetvideo]
  Cyhoeddwyd: (1978)
• Manganese nodules : dimensions and perspectives
  gan: 5240 United Nations Ocean Economics and Technology Office