[Air pollution in Madrid in 1967].
D000397:Air Pollution / Q000032:analysis*; D002248:Carbon Monoxide / Q000032:analysis; D004391:Dust / Q000032:analysis; D009585:Nitrogen Dioxide / Q000032:analysis; D012189:Retrospective Studies; D012621:Seasons; D013030:Spain; D013458:Sulfur Dioxide / Q000032:analysis
D004391:Dust; D013458:Sulfur Dioxide; D002248:Carbon Monoxide; D009585:Nitrogen Dioxide
La contaminación atmosférica de Madrid en el año 1967.