Relay unit BE-84-A (teletype trunk) - USA Voorschrift, Technical Manual, 11-343 Regulations for United States military telegraph lines, alaskan cables, and telegraph stations u.s. signal corps / prepared under the direction of brigadier general George P. … Regulations for United States military telegraph lines, alaskan cables, and telegraph stations u.s. signal corps / prepared under the direction of brigadier general George P. … Infantry communication data Visual signaling Signal Corps United States Army General, property and disbursing regulations / Signal Corps United States Army Pre-induction vocational training in electrical signal communication research paper improved radio sonde and its performance / by Harry Diamond [et al.] Keyers TG-10-A, TG-10-B, TG-10-C, TG-10-D, TG-10-F, TG-10-G, TG-10-H and TG-10-J - USA Voorschrift, Technical Manual, 11-447 Signal generator TS-343/U - USA Voorschrift, Technical Manual, 11-1233 Signal Corps Training Aids Catalog. - USA Voorschrift Signal Corps 695-1