Barytes and strontium in 1915 /
Wedi'i Gadw mewn:
| Prif Awdur: | |
|---|---|
| Fformat: | Llyfr |
| Iaith: | English |
| Cyhoeddwyd: |
Washington :
Government Printer.
|
| Cyfres: | Mineral resources of the United States ;
1915, Pt. II |
| Pynciau: |
CARM 1 Store
| Rhif Galw: |
B12758 |
|---|---|
| Copi 1 | Ar gael Gwneud Cais |