TY - JOUR AU - S.-I. Chu BT - The Astrophysical Journal DA - Jan-06-1976 DO - 10.1086/154422 PY - 1976 EP - 640 T2 - The Astrophysical Journal TI - Collisionally induced hyperfine-structure transitions of OH UR - http://adsabs.harvard.edu/full/1976ApJ...206..640C VL - 206 SN - 0004-637X ER -