The choice of a calibration gas for CH4 spectrophone measurements: NH3 or a small amount of C2H6 in CH4 Back to all publications Publication date 1 January 1971 Reference M.H. de Vasconcelos, F. Cannemeijer and A.E. de Vries, The choice of a calibration gas for CH4 spectrophone measurements: NH3 or a small amount of C2H6 in CH4, Chem. Phys. Lett. 12, 154-156 (1971)