Difference between revisions of "GR-3"
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==References== | ==References== | ||
* TM 11-444 Sound Ranging Set GR-3-C (12 June 1943); 72 pages | * TM 11-444 Sound Ranging Set GR-3-C (12 June 1943); 72 pages | ||
+ | |||
+ | * [[File:SIG 7-GR-3.pdf]] |