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http://vietnamawbb.weebly.com/domino-theory.html
http://www.ducksters.com/history/cold war/communism.php
http://primeministers.naa.gov.au/primeministers/menzies/in-office.aspx#section8
http:simple.wikipedia.org/wiki/Communism
http://www.skwirk.com/p-c_s-56_u-490_t-1333_c-5124/the-fear-of-communism-in-australia/tas/the-fear-of-communism-in-australia/australia-after-1945/the-spread-of-communism-after-world-war-ii
http://vietnamawbb.weebly.com/domino-theory.html
http://www.ducksters.com/history/cold war/communism.php
http://primeministers.naa.gov.au/primeministers/menzies/in-office.aspx#section8
http:simple.wikipedia.org/wiki/Communism
http://www.skwirk.com/p-c_s-56_u-490_t-1333_c-5124/the-fear-of-communism-in-australia/tas/the-fear-of-communism-in-australia/australia-after-1945/the-spread-of-communism-after-world-war-ii