Senate Hearing, 90th Congress - Air pollution-- 1967 (automotive air pollution). Part 4: hearings before the Subcommittee on Air and Water Pollution of the Committee on Public Works, United States Senate, Ninetieth Congress, first session.
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Chicago
Senate, Congress."
S. Hrg. 90 - Air pollution-- 1967 (automotive air pollution). Part 4: hearings before the Subcommittee on Air and Water Pollution of the Committee on Public Works, United States Senate, Ninetieth Congress, first session.. Government. U.S. Government Printing Office https://www.govinfo.gov/app/details/CHRG-90shrg77515Op4.
APA
Senate, Congress. (1967, May 15). Senate Hearing, 90th Congress - Air pollution-- 1967 (automotive air pollution). Part 4: hearings before the Subcommittee on Air and Water Pollution of the Committee on Public Works, United States Senate, Ninetieth Congress, first session.. [Government]. U.S. Government Printing Office. https://www.govinfo.gov/app/details/CHRG-90shrg77515Op4
MLA
Senate, Congress. Senate Hearing, 90th Congress - Air pollution-- 1967 (automotive air pollution). Part 4: hearings before the Subcommittee on Air and Water Pollution of the Committee on Public Works, United States Senate, Ninetieth Congress, first session.. U.S. Government Printing Office, (15 May 1967), https://www.govinfo.gov/app/details/CHRG-90shrg77515Op4
Bluebook
Senate, Congress, Air pollution-- 1967 (automotive air pollution). Part 4: hearings before the Subcommittee on Air and Water Pollution of the Committee on Public Works, United States Senate, Ninetieth Congress, first session., GovInfo, (May 15, 1967), https://www.govinfo.gov/app/details/CHRG-90shrg77515Op4