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
Acidic Deposition: State of Science and Technology. Report 14. Methods for Projecting Future Changes in Surface Water Acid-Base Chemistry. Thornton, K. W; Marmorek, D; Ryan, P. F; Heltcher, K; Robinson, D.	PB92100502	1990	163 pages
Acidic Deposition: State of Science and Technology. Report 12. Episodid Acidification of Surface Waters Due to Acidic Deposition. Wigington, P. J; Davies, T. D; Tranter, M; Eshleman, K. N.	PB92100486	1990	200 pages
Acidic Deposition: State of Science and Technology. Report 13. Biological Effects of Changes in Surface Water Acid-Base Chemistry. Baker, J. P; Bernard, D. P; Christensen, S. W; Freda, J; Suter, G. W.	PB92100494	1990	398 pages