Air Pollution In Pittsburgh: A Historical Perspective
1979 ◽
Vol 29
(10)
◽
pp. 1035-1041
◽
2007 ◽
Vol 333
(4)
◽
pp. 230-234
◽
2019 ◽
1990 ◽
Vol 23
(4)
◽
pp. 571-575
2002 ◽
Vol 117
(6)
◽
pp. 501-512
◽