ITU

التزام بتوصيل العالم

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Superseded