TY - JOUR AU - David Hummer AU - G. Rybicki BT - Journal of Quantitative Spectroscopy and Radiative Transfer DA - Jan-01-1966 DO - 10.1016/0022-4073(66)90054-9 PY - 1966 SP - 661 EP - 671 T2 - Journal of Quantitative Spectroscopy and Radiative Transfer TI - Non-LTE line formation with spatial variations in the Doppler width VL - 6 SN - 00224073 ER -