1. Robert John Bell, Introductory Fourier Transform Spectroscopy, (Academic Press, New York, 1972), pp. 1–15
2. Robert John Bell, Introductory Fourier Transform Spectroscopy, (Academic Press, New York, 1972),, 193–195.
3. Marvin T. Margoshes, “Air Pollution Monitoring,” Reprint available from Digilab, Inc., 237 Putnam Ave., Cambridge, Mass. 02139.
4. Lawrence Mertz, Transformations in Optics, (John Wiley and Sons, New York, 1965), p. 7–8.
5. Lawrence Mertz, Transformations in Optics, (John Wiley and Sons, New York, 1965),, Ibid. p. 15.