AIR POLLUTION FROM COAL REFUSE DISPOSAL AREAS.
D000397:Air Pollution; D002623:Chemistry Techniques, Analytical; D003031:Coal; D003032:Coal Mining; D007878:Legislation as Topic; D010414:Pennsylvania; D012037:Refuse Disposal; D013223:Statistics as Topic
D003031:Coal
AIR POLLUTION; CHEMISTRY, ANALYTICAL; COAL MINING; LEGISLATION; PENNSYLVANIA; REFUSE DISPOSAL; STATISTICS