Aerial sampling by helicopter using a high volume sampler.
D000336:Aerosols / Q000032:analysis; D000397:Air Pollution / Q000032:analysis* / Q000517:prevention & control; D000401:Aircraft; D000531:Altitude; D003300:Copper / Q000032:analysis; D004781:Environmental Exposure; D005374:Filtration; D007501:Iron / Q000032:analysis; D007854:Lead / Q000032:analysis; D008722:Methods; D014505:Urban Population; D015032:Zinc / Q000032:analysis
D000336:Aerosols; D007854:Lead; D003300:Copper; D007501:Iron; D015032:Zinc