The Northumberland and Durham coalfield : Northumberland area : the yard seam.
| Typ dokumentu: | Kniha |
|---|---|
| Jazyk: |
angličtina |
| Vydavatel: |
London :
Her Majesty's Stationary Office,
1931.
|
| Edice: |
Physical and chemical survey of the national coal resources ;
No. 21 |
| Předmět: | |
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