World Resources Institute

Environmental data report United Nations Environment Programme 1987 The 1992 information please environmental almanac compiled by World Resources Institute 1991 World Resources 1987 World Resources Institute 1987 World Resources 1987 World Resources Institute 1987 World resources 1992-93 by the World Resources Institute in collaboration with the United Nations Environment Programme and the United Nations Development Programme 1992 World resources 2000-2001 United Nations Development Programme, United Nations Environment Programme, World Bank, World Resources Institute 2000 World resources, 1996-97 by The World Resources Institute, in collaboration with the United Nations Environment Programme and the United Nations Development Programme 1996