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1 The reduction methods of operator's radiation dose for portable dental X-ray machines
Jeong-Yeon Cho, Won-Jeong Han
Restor Dent Endod.2012;37(3):160-164.   Published online 2012 August 29     DOI: http://dx.doi.org/10.5395/rde.2012.37.3.160
      
2 Absorbed and effective dose for periapical radiography using portable and wall type dental X-ray machines
Won-Jeong Han
J Korean Acad Prosthodont.2012;50(3):184-190.   Published online 2012 July 31     DOI: http://dx.doi.org/10.4047/jkap.2012.50.3.184
      

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