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18 September 2017
- (diff | hist) . . m Radio frequency; 14:05 . . (+14) . . Geoffrey.landis (added AM and FM to see-also)
- (diff | hist) . . Radio frequency; 14:01 . . (+683) . . Geoffrey.landis (added designations microwave and millimeter wave)
- (diff | hist) . . Radio frequency; 13:44 . . (+755) . . Geoffrey.landis (Frequency bands -- added mention of other common band designations)