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
Conceptual Designs for a New Highway Vehicle Emissions Estimation Methodology. Ripberger, J. T.	PB94120128	1993	239 pages
EPA PUBLICATIONS BIBLIOGRAPHY: QUARTERLY ABSTRACT BULLETIN. JANUARY-MARCH 1994.	PB94904201	1994	117 pages
EPA Publications Bibliography: Quarterly Abstract Bulletin. October-December 1994.	PB94904204	1994	412 pages