Man explores the sea

Eitemau Tebyg

• Oceans : an atlas history of man's exploration of the deep
  gan: Deacon, Ger
• Secret of the sea
  gan: Clewes, Dorothy
• Explorers of the pacific
  gan: Buck, Peter, H.
  Cyhoeddwyd: (1953)
• Survive the savage sea
  gan: Robertson, Dougal
• Galathea deep sea expedition
  gan: Bruun, Anton, F.