[Pollution of the atmospheric air with formaldehyde].
D000393:Air Pollutants / Q000032:analysis*; D002031:Bulgaria; D005557:Formaldehyde / Q000032:analysis; D012621:Seasons
D000393:Air Pollutants; D005557:Formaldehyde
Zagriaznenie atmosfernogo vozdukha formal'degidom