G

George C Sprunk

1905

2 books found

Books by George C Sprunk
Mineral matter in coalGeorge C Sprunk
⏱ 1h 7m

Mineral matter in coal

George C Sprunk

194267 pp.
Splint coals of the Appalachian RegionGeorge C Sprunk
⏱ 59m

Splint coals of the Appalachian Region

George C Sprunk

194059 pp.