1
Published 1984
American Chemical Society
Subjects: ...Subbituminous coal / Composition / Analysis...

2
Published 1994
American Chemical Society
Subjects: ...Coal / analysis...

3
Published 1990
American Chemical Society
Subjects: ...Coal / Sulfur content...

5
Published 1987
American Chemical Society
Subjects: ...Coal...

6
Published 1986
American Chemical Society
Subjects: ...Coal / adverse effects...

7
Published 1993
American Chemical Society
Subjects: ...Coal Mining...