Proceedings and documentation of the Symposium organized by the United Nations Economic Commission for Europe and held from 2 to 15 May 1971, in Prague (Czechoslovakia), with a study tour to the region of Ostrava (Czechoslovakia) and Katowice (Poland).
Series: ST/ECE/ENV/1
Publisher: United Nations; H.M.S.O.
Published: 1971
Place of publication: New York; London
Language: eng