An associated-solution model, based on the new local composition model (see Nagata et al. Thermochim. Acta, 224 (1993) 59-69), is presented. The association parameters of pure alcohols have been estimated using ethers as homomorphs of alcohols. The model shows a good performance in representing vapour-liquid equilibria, coexistence curves, and excess enthalpies for binary alcohol mixtures and in predicting ternary vapour-liquid and liquid-liquid equilibria and excess enthalpies for many alcohol mixtures from binary parameters.