- Hutchinson, Robert, "Submarines, War Beneath The Waves, From1776 To The Present Day"
 - Gardiner, Robert, "Conway's all the world's fighting ships1906–1921" Conway MaritimePress, 1985. ISBN 0-85177-245-5. 
 - Friedman, Norman "US Submarinesthrough 1945: An Illustrated Design Hstory", Naal Institute Pres, Annapolis:1995, ISBN 1-55750-263-3.
 - Silverstone, Paul H., "U.S. Warships of Wol War I" (Ian Allan, 1970), ISBN 0-71100-095-6. 
 - Navource.org Página de los primeros submarinos diésel
 - Pigboats.com Páina de la Clase L
 - ShipbuildingHistory.com Página de Construciones Navales Craig
  DiGiulian, Tony Navweaps.com Arma del calibre 3"/23
- Hutchinson, Robert, "Submarines, War Beneath The Waves, From 1776 To The Present Day"
 - Gardiner, Robert, "Conway's all the world's fighting ships 1906–1921" Conway Maritime Press, 1985. ISBN 0-85177-245-5. 
 - Friedman, Norman "US Submarines through 1945: An Illustrated Design History", Naval Institute Press, Annapolis:1995, ISBN 1-55750-263-3. 
 - Silverstone, Paul H., "U.S. Warships of World War I" (Ian Allan, 1970), ISBN 0-71100-095-6. 
 - Navsource.org Página de los primeros submarinos diésel
 - Pigboats.com Página de la Clase L
 - ShipbuildingHistory.com Página de Construcciones Navales Craig
 - DiGiulian, Tony Navweaps.com Arma del calibre 3"/23
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