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- catalog contributor b4382647.
- catalog contributor b4382648.
- catalog created "1963]".
- catalog date "1963".
- catalog date "1963]".
- catalog dateCopyrighted "1963]".
- catalog description "Bibliography: p. 30.".
- catalog extent "30 p. :".
- catalog issued "1963".
- catalog issued "1963]".
- catalog language "eng".
- catalog publisher "[Philadelphia : Pennsylvania-New Jersey-Delaware Metropolitan Project,".
- catalog spatial "Penjerdel region.".
- catalog spatial "Pennsylvania Philadelphia Metropolitan Area.".
- catalog subject "Air Pollution Penjerdel region.".
- catalog subject "Air Pollution Pennsylvania Philadelphia Metropolitan Area.".
- catalog title "Clearing the air : a regional challenge / by Katherine N. Gabell.".
- catalog type "text".