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lignite
3Documents about lignite
Documents about lignite
- 30 U.S.C. § 541b — Mining, removal, and disposal of lignite#584617US Code (LII)
- 30 U.S.C. § 4 — Investigation of lignite coal and peat#584846US Code (LII)
- 30 U.S.C. § 4c — Investigation of sub-bituminous and lignite coal#584849US Code (LII)
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