The infra-red frequencies independent of the alkali halide crystals.

[1] Measurements on NaCl and KCl in the spectral range of infra-red natural frequencies [J]. ZEITSCHRIFT FUR PHYSIK, 1931, 72 (7-8): : 447 - 461

[2] Measurements in the long wave-lenght infrared from 20 mu to 135 mu [J]. PHYSICAL REVIEW, 1932, 39 (04): : 562 - 575

[3] Measurements on Rock Salt in the Infra-Red for Examination of the Dispersion Theory [J]. ZEITSCHRIFT FUR PHYSIK, 1930, 65 (9-10): : 600 - 631

[4] Balance beam frequencies and dispersion in the ultra natural frequencys [J]. ZEITSCHRIFT FUR PHYSIK, 1928, 46 (7-8): : 506 - 518

[5] Matossi F, 1932, PHYS Z, V33, P172

[6] Reinkober O, 1930, ANN PHYS-BERLIN, V6, P785

[7] New residual rays and surface oscillation of residual rays [J]. ZEITSCHRIFT FUR PHYSIK, 1926, 39 (5/6): : 437 - 443

[8] SCHAEFER C, 1930, ULTRAVIOLETTE SPEKTR

[1] Measurements on NaCl and KCl in the spectral range of infra-red natural frequencies [J]. ZEITSCHRIFT FUR PHYSIK, 1931, 72 (7-8): : 447 - 461

[2] Measurements in the long wave-lenght infrared from 20 mu to 135 mu [J]. PHYSICAL REVIEW, 1932, 39 (04): : 562 - 575

[3] Measurements on Rock Salt in the Infra-Red for Examination of the Dispersion Theory [J]. ZEITSCHRIFT FUR PHYSIK, 1930, 65 (9-10): : 600 - 631

[4] Balance beam frequencies and dispersion in the ultra natural frequencys [J]. ZEITSCHRIFT FUR PHYSIK, 1928, 46 (7-8): : 506 - 518

[5] Matossi F, 1932, PHYS Z, V33, P172

[6] Reinkober O, 1930, ANN PHYS-BERLIN, V6, P785

[7] New residual rays and surface oscillation of residual rays [J]. ZEITSCHRIFT FUR PHYSIK, 1926, 39 (5/6): : 437 - 443

[8] SCHAEFER C, 1930, ULTRAVIOLETTE SPEKTR