Mining and upgrading of brown coal in Europe : developments and prospects
prepared by the Secretariat of the Economic Commission for Europe
Bok Engelsk 1957
| Utgitt | Geneva : United Nations , 1957
|
|---|---|
| Omfang | 1 b. (flere pag.)
|
| Opplysninger | "United Nations publication. Sales no. : 1957.II.E/Mim.20."
|
| Emner |
