Introduction: Why an Evaluation of NMR is Necessary at This Time. Review of Solution NMR of Humic Substances. Solid-State NMR of HUMIC Materials. Review of ESR Spectroscopy of Humic Substances. The Application of Selective Chemistry to the NMR Analyses of Humic Substances and Coals. Polarization Transfer and 2-D Experiments in NMR of Solutions of Humic Materials and Fossil Fuel Liquids. Techniques for Wideline NMR. Detection of Mobile Components in the Solid State NMR of Coals. Effects of Molecular Mobility on High Resolution Solid State NMR Spectra - Model Systems. NMR Evidence for a Membrane Model of Soil Humic Acid. Solid State 13C NMR Measurements of Humic Substances: An Examination of Factors Affecting Their Reliable Interpretation. Overview. Index.