PH-33
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References
- TM 11-2534 Theodolites PH-BC-33, PH-BD-33, PH-BE-33, PH-BF-33, PH-BG-33, PH-BH-33 and Theodolite MX-194/TVQ-1. War Dept. Jun. 1945. 189 p. U408.3.A13 TM 11-2534 Jun. 1945