A technique is presented for increasing the information content of 13C NMR spectroscopy by introducing correlated proton shift information. It is an application of a general expt. proposed and realized for the indirect detection of 13C resonance by R. R. Ernst and A. A. Maudsley (1977). The application of this technique is illustrated by the shift correlation spectrum of EtOH. Simplification of these 2-dimensional correlations can be achieved by greatly reducing the splitting due to protons in both frequency dimensions. [on SciFinder (R)]