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
Investigation of Electrical Properties of Porous Media. Wheatcraft, S. W; Taylor, K. C; Haggard, J. G.	PB85137156	1984	117 pages
Use of Airborne, Surface, and Borehole Geophysical Techniques at Contaminated Sites: A Reference Guide. Boulding, J. R.	PB94123825	1993	310 pages
Subsurface Characterization and Monitoring Techniques: A Desk Reference Guide. Volume 1. Solids and Ground Water Appendices A and B.	PB94136272	1993	496 pages