TY - JOUR AU - M. Dopita AU - D. Mason AU - W. Robb BT - The Astrophysical Journal DA - Jan-07-1976 DO - 10.1086/154472 PY - 1976 EP - 102 T2 - The Astrophysical Journal TI - Atomic nitrogen as a probe of physical conditions in the interstellar medium UR - http://articles.adsabs.harvard.edu/full/1976ApJ...207..102D VL - 207 SN - 0004-637X ER -