(1991). New data on depletion of the ozone layer: Hearing before the Subcommittee on Science, Technology, and Space of the Committee on Commerce, Science, and Transportation, United States Senate, One Hundred Second Congress, first session, April 16, 1991.
Citace podle Chicago (17th ed.)New Data on Depletion of the Ozone Layer: Hearing Before the Subcommittee on Science, Technology, and Space of the Committee on Commerce, Science, and Transportation, United States Senate, One Hundred Second Congress, First Session, April 16, 1991. 1991.
Citace podle MLA (9th ed.)New Data on Depletion of the Ozone Layer: Hearing Before the Subcommittee on Science, Technology, and Space of the Committee on Commerce, Science, and Transportation, United States Senate, One Hundred Second Congress, First Session, April 16, 1991. 1991.