Summarized data of zinc production, showing relation of production in U.S. to that of world [microform]
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| Other Authors: | |
|---|---|
| Format: | Microfilm Book |
| Language: | English |
| Published: |
[Washington?] :
U.S. G.P.O.,
1929.
|
| Series: | Mines Bur. Economic Paper ;
No. 2. |
| Subjects: |
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