Spectra Congresses 4 Chemical structure 3 Nuclear magnetic resonance spectroscopy 3 Tables 3 Analysis 2 Hydrocarbons 2 Máis ... Ions 2 Organic compounds 2 Polymers 2 Absorption spectra 1 Additives 1 Aromatic compounds 1 Astronomical photometry 1 Atlases 1 Atomic spectra 1 Atomic transition probabilities 1 Biochemical markers 1 Biogeochemistry 1 Catalogs 1 Charts, diagrams, etc 1 Chemistry, Analytic 1 Chemistry, Organic 1 Classification 1 Crystals 1 Fermions 1 Gases 1 Geology 1 Gums and resins 1 Halogens 1 menos ...