| http://www.w3.org/ns/prov#value | - By the early 1980s, however, the influence of OPEC on world oil prices began to decline; Western nations were successfully exploiting alternate sources of energy such as coal and nuclear power, and large, new oil fields had been tapped in the United States and other non-OPEC oil-producing nations. 1972 Peace talks between Pathet Lao and Royal Lao government begin in Vietnam. ^ 1966 Vietnam: US Pre
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