[PDF] Methods Of Development And Pillar Extraction In Mining The Pittsburgh Coal Bed In Pennsylvania West Virginia And Ohio Full Read

Language: en
Pages: 76

Authors: James Washington Paul

Categories: Coal mines and mining

Type: BOOK - Published: 1935 - Publisher:

Language: en
Pages: 1042

Authors:

Categories: Mine safety

Type: BOOK - Published: 1933 - Publisher:

Language: en
Pages: 1252

Authors: Arno Carl Fieldner

Categories: Carbonization

Type: BOOK - Published: 1937 - Publisher:

Language: en
Pages: 154

Authors: Arno Carl Fieldner

Categories: Coal

Type: BOOK - Published: 1937 - Publisher:

Language: en
Pages: 1134

Authors: United States. Bureau of Mines

Categories: Mines and mineral resources

Type: BOOK - Published: 1936 - Publisher: