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World Atlas of Ground Conductivities

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You are here Home > ITU Publications > Radiocommunication (ITU-R) > ITU-R Opinions > World Atlas of Ground Conductivities

Opinion 91
Main
Number
 Title Status
Op. 91-2 (2007)
  		World Atlas of Ground Conductivities  
 		In force (Main)
 
 
Previous versions
Number
 Title Status
Op.91-1 (1997)
  		World Atlas of Ground Conductivities  
 		Superseded

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