National air quality status report (2005-2007).

Geahča maid

• Air quality monitoring and control strategy
  Dahkki: Singal, S.P
  Almmustuhtton: (2012)
• Air quality control formation and sources, dispersion, characteristics and impact of air pollutants--measuring methods, techniques for reduction of emissions and regulations for air quality control
  Dahkki: Baumbach, Gunter
  Almmustuhtton: (1996)
• National state of the brown environment report (2005-2007).
  Almmustuhtton: (2009)
• Air pollution
  Dahkki: Parker, Homer W. 1921-
  Almmustuhtton: (1977)
• Clearing the air a global agenda
  Dahkki: French, Hilary F.
  Almmustuhtton: (1990)