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by -- Secretary of State for the Environment -- Study of public opinion in connection with the United Nations Conference on the Human Environment; Stockholm, June 1972.
by Ashby, Sir Eric, chrmn. -- Secretary of State for the Environment -- Study of public opinion in connection with the United Nations Conference on the Human Environment; Stockholm, June 1972.
by -- Department of Environment, Govt. of Great Britain -- United Nations Conference on the Human Environment; Stockholm, 1972.
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