The Yorkshire, Nottinghamshire and Derbyshire Coalfield, South Yorkshire area : analysis of commercial grades of the silkstone seam.
| Typ dokumentu: | Kniha |
|---|---|
| Jazyk: |
angličtina |
| Vydavatel: |
London :
Her Majesty's Stationary Office,
1932.
|
| Edice: |
Physical and chemical survey of the national coal resources ;
No. 25 |
| Předmět: | |