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
Site-Specific Water Quality Studies of the Straight River, Minnesota: Complex Effluent Toxicity, Zinc Toxicity, and Biological Survey Relationships. Carlson, A. R; Roush, T. H.	PB85160703	1985	62 pages
Synopsis of Water-Effect Ratios for Heavy Metals as Derived for Site-Specific Water Quality Criteria. Brungs, W. A; Holderman, T. S; Southerland, M. T.	PB93157584	1992	42 pages