↑ Peter Doyle; Matthew R. Bennett (2002). Fields of Battle: Terrain in Military History. Dordrecht: Kluwer Academic. ISBN1-4020-0433-8.
↑ The three mile limit is often circumvented by boats offering Gambling Cruises or Party Cruises. Past the three mile limit, a States restrictive laws are relaxed, so gambling or teenage drinking in the United States become unenforceable in courts.
