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- [4] The radiotelegraphic direct current sound transmitter. PHYSIKALISCHE ZEITSCHRIFT, 1911, 12 : 71 - 71
- [5] BIRD-BORNE TRANSMITTER. Johns Hopkins APL Technical Digest (Applied Physics Laboratory), 1985, 6 (01): : 60 - 67
- [9] The radiotelegraphic direct current sound transmitter. PHYSIKALISCHE ZEITSCHRIFT, 1911, 12 : 70 - 70
- [10] TS 1085 - A PORTABLE WIREPHOTO TRANSMITTER. Telcom Report (English Edition), 1980, 3 (04): : 271 - 274