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Search U.S. government technical reports digitized or harvested by TRAIL.
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4 results returnedAnnual Report of Research and Technologic Work on Coal: Fiscal Year 1941
Annual Report of Research and Technologic Work on Coal: Fiscal Year 1942
Annual Report of Research and Technologic Work on Coal: Fiscal Year 1943
Annual Report of Research and Technologic Work on Coal: Fiscal Year 1946
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