Survey of bipolar outflows and methanol masers in the C32S ( and C34S (2-1) lines in the Northern skyG. M. Larionov, I. E. Val'tts, A. Winnberg, L. E.B. Johansson, R. S. Booth and V. V. GolubevAstron. Astrophys. Suppl. Ser., 139 2 (1999) 257-275DOI: https://doi.org/10.1051/aas:1999392