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WikiPedia: Thí_nghiệm http://www.madsciencebook.com http://www.mathpages.com/rr/s2-04/2-04.htm http://www.people.com/people/archive/article/0,,20... http://www.ScienceCastle.com/ http://www.time.com/time/magazine/article/0,9171,9... http://plato.stanford.edu/entries/physics-experime... http://depts.washington.edu/methods/readings/Shadi... http://www.js.pentagon.mil/ttcp/GUIDExBookFeb2006.... http://www.electriccircuits.net/book,6,experiments... http://www.socialresearchmethods.net/kb/desexper.h...