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- [38] Measuring U.S. innovative activity: business data at the U.S. Census Bureau JOURNAL OF TECHNOLOGY TRANSFER, 2008, 33 (02): : 153 - 171
- [39] Analysis of the Conversion of U.S. Engineering Doctoral Dissertations into U.S. Patent Applications Science and Technology Libraries, 2016, 35 (02): : 99 - 108
- [40] Vivendi acquires U.S. filter; AmerAlia, U.S. filter in bicarb link Chemical Week, 1999, 161 (12):