Nuclear magnetic resonance spectroscopy, B.E.Mann; nuclear quadrupole resonance spectroscopy, K.B.Dillon; rotational spectroscopy, S.Cradock; characteristic vibrations of compounds of main-group elements, G.Davidson; vibrational spectra of transition-element compounds, G.Davidson; vibrational spectra of some co-ordinated ligands, G.Davidson; Moessbauer spectroscopy, S.J.Clark et al; gas-phase molecular structures determined by electron diffraction, D.W.H.Rankin and H.E.Robertson.