TY  - GEN
TI  - Improvements in the Manufacture of Coiled Coil Filaments for Electric  Incandescent Lamps
PY  - 0000///[n.d]
CY  - London
PB  - Public Record Office
N1  - PTSL : Koleksi Media; No.2569 [Page 14]; 26th Sept. 1935
ER  -