A low grid-current vacuum tube

[1] MULDER, 1929, J O S A R S I, V18, P470

[2] A vacuum tube electrometer [J]. REVIEW OF SCIENTIFIC INSTRUMENTS, 1930, 1 (05) : 281 - 284

[3] NOTTINGHAM, 1930, J FRANK I, V209, P287

[4] The excitation of soft X-rays [J]. PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES A-CONTAINING PAPERS OF A MATHEMATICAL AND PHYSICAL CHARACTER, 1926, 110 (754) : 247 - 282

[5] The emission of positive ions from tungsten and molybdenum [J]. PHYSICAL REVIEW, 1930, 35 (04): : 0381 - 0395

[6] Soft x-rays from iron [J]. PHYSICAL REVIEW, 1925, 25 (03): : 322 - 332

[7] WAHLEN, 1929, PHYS REV, V34, P164

[8] WOLD PI, 1916, Patent No. 1232879

[9] WYNNWILLIAMS, 1927, P CAMBR SOC, V23, P810

[1] MULDER, 1929, J O S A R S I, V18, P470

[2] A vacuum tube electrometer [J]. REVIEW OF SCIENTIFIC INSTRUMENTS, 1930, 1 (05) : 281 - 284

[3] NOTTINGHAM, 1930, J FRANK I, V209, P287

[4] The excitation of soft X-rays [J]. PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES A-CONTAINING PAPERS OF A MATHEMATICAL AND PHYSICAL CHARACTER, 1926, 110 (754) : 247 - 282

[5] The emission of positive ions from tungsten and molybdenum [J]. PHYSICAL REVIEW, 1930, 35 (04): : 0381 - 0395

[6] Soft x-rays from iron [J]. PHYSICAL REVIEW, 1925, 25 (03): : 322 - 332

[7] WAHLEN, 1929, PHYS REV, V34, P164

[8] WOLD PI, 1916, Patent No. 1232879

[9] WYNNWILLIAMS, 1927, P CAMBR SOC, V23, P810