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
System Installation and Operation Manual for the EPA Third-Generation Air Quality Modeling System (Models-3 Version 3.0).	PB2000101617	1999	166 pages
User Manual for the EPA Third-Generation Air Quality Modeling System (Models-3 Version 3.0).	PB2000100247	1999	434 pages
User Manual for the EPA Third-Generation Air Quality Modeling System (Models-3 Version 3.0). Appendices.	PB2000100248	1999	510 pages
Science Algorithms of the EPA Models-3 Community Multiscale Air Quality (CMAQ) Modeling System. Byun, D. W; Ching, J. K. S.	PB2000100561	1999	770 pages