APA

ECE Symposium on Problems Relating to Environment, ECE Symposium on Problems Relating to Environment, ECE Symposium on Problems Relating to Environment & United Nations. (1971). 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). New York: United Nations.

Chicago

ECE Symposium on Problems Relating to Environment, ECE Symposium on Problems Relating to Environment, ECE Symposium on Problems Relating to Environment and United Nations. 1971. 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). New York: United Nations.

Harvard

ECE Symposium on Problems Relating to Environment, ECE Symposium on Problems Relating to Environment, ECE Symposium on Problems Relating to Environment and United Nations. (1971). 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). New York: United Nations.

MLA

ECE Symposium on Problems Relating to Environment, ECE Symposium on Problems Relating to Environment, ECE Symposium on Problems Relating to Environment and United Nations. 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). New York: United Nations. 1971.