• AllAboutIrish: John Holland - Pat Friend presents this article about the life and work of the submarine inventor.
• John Philip Holland and His Submarines - Information on the man who invented the submarine. Includes his designs, history, patents, articles, and more.
• John Philip Holland Wanting to Set Up Shop in the Netherlands - Outlines the trouble John Holland encountered when he tried to set up a company to manufacture submarines in Europe using his expertise and patents.
• Wikipedia: John Philip Holland - Biography of the Irish-born engineer whose first true submarine was accepted by the U.S. Navy.

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