Atoms Molecular ray Physics ATOMIC SPECTRA AND ATOMIC STRUCTURE Atomic structure Chemistry Infrared MOLECULAR SPECTRA AND MOLECULAR STRUCTURE-- ELECTRONIC SPECTRA AND ELECTRONIC STRUCTURE OF POLYATOMIC MOLECULES Molecular spectra Molecular spectroscopy--Tables.Molecular structure Molecular spectroscopy; Nuclear structure; Atomic and Nuclear physics Molecules Nuclear Spin Radiation Raman Spectra Spectra Spectrum analysis The Empirical Hydrogen Terms Vibration Vibration Spectra