1. 1.7 References for 1.1 to 1.6
2. Landolt-Börnstein, New Series, Vol. II/6, “Molecular Constants Mostly from Microwave, Molecular Beam, and Electron Spin Resonance Spectroscopy”, K.-H. and A.M. Hellwege (eds.), Berlin: Springer, 1974.
3. Landolt-Börnstein, New Series,Vol. II/14a, “Molecular Constants Mostly from Microwave, Molecular Beam, and Electron Resonance Spectroscopy”, K.-H. and A.M. Hellwege (eds.), Berlin: Springer, 1982.
4. Landolt-Börnstein, New Series, Vol. II/14b, “Molecular Constants Mostly from Microwave, Molecular Beam, and Sub-Doppler Laser Spectroscopy”, K.-H. and A.M. Hellwege (eds.), Berlin: Springer, 1983.
5. Landolt-Börnstein, New Series, Vol. II/19a, “Molecular Constants Mostly from Microwave, Molecular Beam, and Sub-Doppler Laser Spectroscopy: Rotational, l-type, Centrifugal Distortion and Related Constants of Diamagnetic Diatomic, Linear, and Symmetric Top Molecules”, W. Hüttner (ed.), Berlin: Springer, 1992.