THE OPTICAL EVALUATION OF SMOKE OR PARTICULATE MATTER COLLECTED ON FILTER PAPER.
D000397:Air Pollution; D055598:Chemical Phenomena; D002621:Chemistry; D005374:Filtration; D052638:Particulate Matter; D012906:Smoke; D014026:Nicotiana
D052638:Particulate Matter; D012906:Smoke
AIR POLLUTION; CHEMISTRY