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c1557
- EXPLOSIONS. 177 words cc1557-9
- EXPORTS. 636 words c1559
- WOMEN WAGE-EARNERS, DURHAM COUNTY. 59 words cc1559-60
- OIL PRODUCTION PLANTS, SPECIAL AREAS. 105 words cc1560-1
- ROYALTIES. 555 words cc1561-2
- AMALGAMATIONS. 51 words c1562
- MACHINED-MINED OUTPUT. 98 words c1562
- ACCIDENTS. 105 words cc1562-3
- MINERS' WELFARE:FUND. 101 words c1563
- MINERS' TRANSPORT. 84 words