Technical paper - Bureau of Mines.
Wedi'i Gadw mewn:
| Awdur Corfforaethol: | |
|---|---|
| Fformat: | Dogfen y Llywodraeth Cyfresol |
| Iaith: | English |
| Cyhoeddwyd: |
Washington D.C. :
The Bureau : for sale by the Supt. of Docs., U.S.Govt. Print. Off.
|
| Pynciau: |
| Cyhoeddwyd: | 1-727; 1911-49. |
|---|---|
| Disgrifiad Corfforoll: | 727 nos. : ill., plates, maps, plans, diagrs., forms. ; 25 cm. |
| Publication Frequency: | Irregular |
| ISSN: | 0886-0904 |