Top panel: total power and the stokes V spectra of the OH maser region of OH 37.1-0.8. The V spectrum is shown after removing the residual scaled down of the stokes I. Bottom panel: the OH maser region of OH 37.1-0.8. The offset positions are with respect to the maser reference feature 7. The maser spots are color-coded according to their radial velocity. The size of the spots is scaled logarithmically according to their flux density.