Air quality in selected urban areas 1977-1978.
Treść karty:197,385 AIR Air quality in selected urban areas 1977-1978. GEMS: Global Environmental Monitoring System. Prep, in cooperation with the WHO Colloborating Centre on Environmental Pollution Control, United Stated Environmental Protection Agency Washington, DC, USA. Geneva 1980 World Health Organization 4° s. 71 WHO Offset Publ. nr 57