The Qinghai-Tibet railway.
West
John B
JB
D000062:Accidents, Occupational / Q000517:prevention & control*; D029481:Bronchitis, Chronic / Q000517:prevention & control; D006801:Humans; D009784:Occupational Diseases / Q000517:prevention & control*; D016273:Occupational Exposure / Q000517:prevention & control*; D011322:Primary Prevention / Q000458:organization & administration; D011890:Railroads; D018609:Tibet