Before revision: Late 1900s In 1951, at the Sixth Session of United Nations Educational, Scientific and Cultural Organization (UNESCO) general conference, the Swiss government proposed establishment of a global institution to encourage research and awareness of conservation.
After revision: URLLate 1900s In 1951, at the Sixth Session of United Nations Educational, Scientific and Cultural Organization (UNESCO) general conference, the Swiss government proposed establishment of a global institution to encourage research and awareness of conservation.