World Atlas of Ground Conductivities

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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Op.91-1 (1997)	World Atlas of Ground Conductivities	Superseded

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General Secretariat and ITU Telecom

Radiocommunication (ITU-R)

Standardization (ITU-T)

Development (ITU-D)