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- catalog alternative "Peter S. Thacher Environment Collection env".
- catalog contributor b10964611.
- catalog created "c1992.".
- catalog date "1992".
- catalog date "c1992.".
- catalog dateCopyrighted "c1992.".
- catalog extent "11 p. :".
- catalog identifier "066219733X".
- catalog isPartOf "Fact sheet (Canada. Atmospheric Environment Service)".
- catalog isPartOf "Fact sheet / Atmospheric Environment Service, 0715-0040".
- catalog issued "1992".
- catalog issued "c1992.".
- catalog language "eng".
- catalog publisher "Ottawa, Ontario : Environment Canada, Atmospheric Environment Service,".
- catalog subject "Ozone layer Environmental aspects.".
- catalog subject "Ozone layer depletion.".
- catalog title "The ozone layer.".
- catalog type "text".