“Electricity around the wprld”,<http://users.pandora.be/worldstandards/electricity.htm>
“ELECTRIC POWER AROUND THE WORLD”,<http://www.kropla.com/electric2.htm> (Electric Current Abroad (1998 edition), U. S. Department of Commerce, National Technical Information Service; World Electricity Supplies and Electrical Plugs; an International Survey,(both 1993), British Standards Institute. Additionally, since this table was first posted in late 1995, numerous revisions have (and continue to be) made as a result of personal obserations or reports from other travelers)
