83 Stat. 852
83 Stat. 852; United States Statutes at Large, Volume 83, 91st Congress, 1st Session; An Act to establish a national policy for the environment; to authorize studies, surveys, and research relating to ecological systems, natural resources, and the quality of the human environment; and to establish a Board of Environmental Quality Advisers;
Public Law 91-190
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83 Stat. 852
U.S. Statutes at Large
PDF - https://www.govinfo.gov/link/statute/83/852?link-type=pdf
We also found 2 parallel citations:
HTML - https://www.govtrack.us/congress/bills/91/s1075/text
S. 1075 (91st Congress)
U.S. Legislation
HTML - https://www.govtrack.us/congress/bills/91/s1075/text
U.S. Government Publishing Office