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
The Tapered Element Oscillating Microbalance: A Monitor for Short-Term Measurement of Fine Aerosol Mass Concentration. Patashnick, H; Rupprecht, G.	PB81245219	1981	41 pages
The Tapered Element Oscillating Microbalance: A Monitor for Short-Term Measurement of Fine Aerosol Mass Concentration.	PB82970126	1982	1 pages