"England" . . "Ubådsvæsen" . . "1750-99" . . . . "Krigsskibes konstruktion" . . . . . . "Robert Fulton and The Submarine" . . . . . . . . . . "Robert fulton and the submarine"@en . "Robert Fulton and the submarine" . . . "Robert Fulton and the submarine"@en . . . . . . "Robert Fulton and the submarine, by Wm Barclay Parsons" . . . . . . "Undervandsfartøj" . . "1800-49" . .