TY - JOUR AU - David Hummer BT - The Astrophysical Journal DA - Jan-04-1988 DO - 10.1086/166210 PY - 1988 EP - 477 T2 - The Astrophysical Journal TI - A fast and accurate method for evaluating the nonrelativistic free-free Gaunt factor for hydrogenic ions UR - http://articles.adsabs.harvard.edu/full/1988ApJ...327..477H VL - 327 SN - 0004-637X ER -