TY - JOUR AU - E. Smith AU - John Cooper AU - W. Chappell AU - T. Dillon BT - Journal of Quantitative Spectroscopy and Radiative Transfer DA - Jan-10-1971 DO - 10.1016/0022-4073(71)90113-0 PY - 1971 SP - 1547 EP - 1565 T2 - Journal of Quantitative Spectroscopy and Radiative Transfer TI - An impact theory for Doppler and pressure broadening-I. General theory VL - 11 SN - 00224073 ER -