National Technical Reports Library

The National Technical Information Service acquires, indexes, abstracts, and archives the largest collection of U.S. government-sponsored technical reports in existence. The NTRL offers online, free and open access to these authenticated government technical reports. Technical reports and documents in its repository may be available online for free either from the issuing federal agency, the U.S. Government Publishing Office’s Federal Digital System website, or through search engines.

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Title/Authors	Accession Number	Publication Year	Page Count	Download
Environmental Contamination from Trace Elements in Coal Preparation Wastes. A Literature Review and Assessment. Wewerka, E. M; Williams, J. M; Wanek, P. O; Olsen, J. D.	PB267339	1976	70 pages
Proceedings: Symposium on Coal Cleaning to Achieve Energy and Environmental Goals Held at Hollywood, Florida on September 1978. Volume I. Rogers, S. E; Lemmon, A. W.	PB299383	1979	650 pages