[PDF] Blasting Practices As They Affect The Roof Of Coal Mines In Ohio Pennsylvania And West Virginia Full Read

Language: en
Pages: 20

Authors: John Nicholas Geyer

Categories: Blasting

Type: BOOK - Published: 1933 - Publisher:

Language: en
Pages: 11

Authors: John Nicholas Geyer

Categories: Blasting

Type: BOOK - Published: 1933 - Publisher:

Language: en
Pages: 618

Authors: Paul McIntosh Tyler

Categories: Mining law

Type: BOOK - Published: 1933 - Publisher:

Language: en
Pages: 948

Authors:

Categories: Mines and mineral resources

Type: BOOK - Published: 1933 - Publisher:

Language: en
Pages: 124

Authors: United States. Bureau of Mines

Categories: Coal mine accidents

Type: BOOK - Published: 1945 - Publisher: