TY - JOUR AU - B. Haisch BT - Astronomy and Astrophysics N1 - JILA Pub. 1919 PY - 1979 SP - 161 EP - 170 T2 - Astronomy and Astrophysics TI - Radiative transfer in spherical dust shells using a generalized two-stream Eddington approximation UR - http://adsabs.harvard.edu/full/1979A\%26A....72..161H VL - 72 ER -