Coal exploration records of boreholes.
Gorde:
| Erakunde egilea: | |
|---|---|
| Beste egile batzuk: | , |
| Formatua: | Liburua |
| Hizkuntza: | English |
| Argitaratua: |
[Gaborone] Botswana :
Geological Survey Dept., Ministry of Mineral Resources and Water Affairs,
19.
|
| Gaiak: |
| Alearen deskribapena: | v. 2: Material compiled by D. Green and edited and prepared for publication by J. W. Baldock. |
|---|---|
| Deskribapen fisikoa: | v. : ill. ; 30 cm. |