Wavenumber Tables for Calibration of Infrared Spectrometers - is an atlas of molecular spectra and associated tables of wavenumbers from heterodyne frequency measurements for the calibration of infrared spectrometers. Many of the calibration tables have improved uncertainties  due to recent contributions of workers who have made new sub-Doppler frequency measurements (both in the Time and Frequency Division at NIST and the Institut fur Angewandte Physik in the Univversitat Bonn). Five molecules are included in the atlas CO, OCS, N2O, NO, and CS2. The spectra cover the 488 cm^-1 to 3120 cm^-1 and 4000 cm^-1 to 4400 cm^-1 regions.