United Nations, Ocean Economics and Technology Branch, Seabed Minerals, volume 1 : Assessment of Manganese Nodule Resources. London, Graham & Trotman Ltd, Coll. « Seabed Mineral Series », 1982, 89 p. United Nations, Ocean Economics and Technology Branch, Seabed Minerals, volume 2 : Analysis of Exploration and Mining Technology for Manganese Nodules. London, Graham & Trotman Ltd, Coll. « Seabed Mineral Series », 1984, 152 p.
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