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• physorg.com

  Phys.org - News and Articles on Science and Technology

  

• sigmaaldrich.com

  Sigma-Aldrich: Analytical, Biology, Chemistry & Materials Science products and services. | Sigma-Aldrich

  

• ptk.org

  Phi Theta Kappa Honor Society

  

• sigmasport.co.uk

  Cycle | Run | Swim at Sigma Sports

  

• sigma-imaging-uk.com

  Sigma Imaging (UK) Ltd

  

• nursingsociety.org

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• phikappaphi.org

  Phi Kappa Phi - Founded in 1897 at the University of Maine Phi Kappa Phi is the nation's oldest largest and most selective honor society for all academic disciplines