USA: Forskelle mellem versioner

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I det 21. århundrede kommer omkring to tredjedel af finansieringen af forskning og udvikling fra den private sektor.<ref>{{cite web | url = https://www.census.gov/compendia/statab/2008/tables/08s0775.xls | archiveurl = http://webarchive.loc.gov/all/20120210170338/http%3A//www%2Ecensus%2Egov/compendia/statab/2008/tables/08s0775%2Exls| archivedate = 10. februar 2012| title = Research and Development (R&D) Expenditures by Source and Objective: 1970 to 2004 | publisher = U.S. Census Bureau | accessdate = 19. juni 2007}}</ref> USA er førende i verden med videnskabelige forskningsartikler og [[i-faktoren]].<ref>{{cite news |url= https://www.theguardian.com/education/2006/mar/21/highereducation.uk4 |author=MacLeod, Donald |title= Britain Second in World Research Rankings |date=21. marts 2006 |work= The Guardian |accessdate=14. maj 2006 |location=London}}</ref>
<references group="https://www.banglanews.news/usa/spanish/" />
 
== Yderligere læsning ==