World Resources 1990-91. A report by the World Resources Institute in collaboration with UNEPand UNDP.

מידע ביבליוגרפי
Corporate Authors:	The World Resources Institute, The United Nations Environment Programme, The United Nations Development Programme
פורמט:	ספר
שפה:	English
יצא לאור:	New York, New York Oxford University Press 1990
נושאים:	Statistics. Resource management. World resources data tables. Condition and trends. Climate change.