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
Definition of Adverse Effects for the Purpose of Establishing Secondary National Ambient Air Quality Standards. Tingey, D. T; Hogsett, W. E; Henderson, S.	PB90116617	1989	13 pages
Definition of Adverse Effects for the Purpose of Establishing Secondary National Ambient Air Quality Standards. October-December 1990. Tingey, D. T; Hogsett, W. E; Henderson, S.	PB91171561	1990	7 pages