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| 010 | ⊔ | ⊔ | ‡aa 41004382 |
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| 040 | ⊔ | ⊔ | ‡aCatholic Univ. of America. Library ‡cLDL ‡dm.c. ‡dm/c ‡dUDI ‡dOCoLC ‡dUtOrBLW |
| 043 | ⊔ | ⊔ | ‡an-us--- |
| 050 | 0 | 0 | ‡aTN23 ‡b.N35 no.E-13 |
| 086 | ⊔ | ⊔ | ‡aFW 4.7:E-13 |
| 035 | ⊔ | ⊔ | ‡a(OCoLC)2469110 |
| 100 | 1 | ⊔ | ‡aYaworski, Nicholas |
| 245 | 1 | 0 | ‡aTechnology, employment, and output per man in iron mining / ‡cby N. Yaworski [and others] |
| 260 | ⊔ | ⊔ | ‡aPhiladelphia, Pa. : ‡bWork Projects Administration, National Research Project in cooperation with Dept. of the Interior, Bureau of Mines, ‡c[1940] |
| 300 | ⊔ | ⊔ | ‡axxiii, 264 pages : ‡billustrations, maps ; ‡c26 cm |
| 336 | ⊔ | ⊔ | ‡atext ‡btxt ‡2rdacontent |
| 337 | ⊔ | ⊔ | ‡aunmediated ‡bn ‡2rdamedia |
| 338 | ⊔ | ⊔ | ‡avolume ‡bnc ‡2rdacarrier |
| 490 | 0 | ⊔ | ‡aMineral technology and output per man studies ; ‡vreport no. E-13 |
| 500 | ⊔ | ⊔ | ‡a"June 1940." |
| 504 | ⊔ | ⊔ | ‡aIncludes bibliographical references |
| 538 | ⊔ | ⊔ | ‡aMode of access: Internet. |
| 650 | ⊔ | 0 | ‡aMining machinery |
| 650 | ⊔ | 0 | ‡aMiners ‡zUnited States |
| 650 | ⊔ | 0 | ‡aIron mines and mining ‡zUnited States |
| 710 | 1 | ⊔ | ‡aUnited States. ‡bBureau of Mines |
| 710 | 2 | ⊔ | ‡aNational Research Project on Reemployment Opportunities and Recent Changes in Industrial Techniques (U.S.) |
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