Report in summary of research on the design of opaque reticles

prepared by C.H. Graham, L.A. Riggs, C.G. Mueller, F.A. Mote, Roberta M. Daley.
[Washington, D.C.?] : Division 7, National Defense Research Committee, [1945]
Physical description
1 volume (various pagings) : illustrations ; 28 cm

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