"Wavelength standards in the infrared."@en . . "Electronic books"@en . "Wavelength standards in the infrared [by] K. Narahari Rao, Curtis J. Humphreys [and] D.H. Rank"@en . . . "Wavelength standards in the infrared. [By] K. Narahari Rao ... Curtis J. Humphreys ... D.H. Rank. [With illustrations.]"@en . . . . . . . . . . . . . . "Wavelength standards in the infrared" . "Wavelength standards in the infrared"@en . . . . . . . . "Wavelength Standards of the Infrared" . . . . . . . "Wavelength standards in the infrared. [By] K. Narahari Rao ... Curtis J. Humphreys ... D. H. Rank. [With illustrations.]" . . . . . "Wave length standards in the infra-red"@en . . . . "Infrarotspektroskopie." . . "Espectroscopía atómica." . . "Infrared spectra." . . "Espectroscòpia infraroja." . . "Espectroscopía infrarroja." . . "Espectroscopía molecular." . . "SCIENCE Physics Optics & Light." . . "Infrarot." . . "Spectre infrarouge." . . "Spectres infrarouges." . .