TY - JOUR AU - Gary Ferland AU - K. Korista AU - B. Peterson BT - The Astrophysical Journal DA - Jan-11-1990 DO - 10.1086/185856 PY - 1990 EP - L21 T2 - The Astrophysical Journal TI - Optically thin thermal emission as the origin of the big bump in the spectra of active galactic nuclei UR - http://articles.adsabs.harvard.edu/full/1990ApJ...363L..21F VL - 363 SN - 0004-637X ER -