Comparative coal transportation costs: an economic and engineering analysis of truck, belt, rail, barge and coal slurry and pneumatic pipelines. Volume 8. Yellow ball rail. Final report. [Uses of salvage cars and old track as a gathering system for small mines]
Keyword(s):
1977 ◽
Keyword(s):
1977 ◽
Keyword(s):
1977 ◽
Keyword(s):
1977 ◽
Keyword(s):
1977 ◽
Keyword(s):
1977 ◽
Keyword(s):
1977 ◽
Keyword(s):
Keyword(s):