TY - JOUR AU - John Jefferies BT - Journal of Quantitative Spectroscopy and Radiative Transfer DA - Jan-04-1963 DO - 10.1016/0022-4073(63)90069-4 PY - 1963 SP - 217 EP - 220 T2 - Journal of Quantitative Spectroscopy and Radiative Transfer TI - Line transfer problems UR - http://linkinghub.elsevier.com/retrieve/pii/0022407363900694 VL - 3 SN - 00224073 ER -