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
Development of a Comparative Potency Method for Cancer Risk Assessment of Complex Mixtures Using Short-Term 'In vivo' and 'In vitro' Bioassays. Lewtas, J.	PB86175437	1985	13 pages
EPA's (Environmental Protection Agency's) Integrated Air Cancer Program, Cupitt, L; Lewtas, J.	PB88214754	1988	12 pages