TY - JOUR AU - John Jefferies AU - F. Orrall AU - J. Zirker BT - Solar Physics DA - Jan-02-1972 DO - 10.1007/BF00148698 PY - 1972 SP - 307 EP - 316 T2 - Solar Physics TI - The interpretation of total line intensities from optically thin gases I. A General Method VL - 22 SN - 0038-0938 ER -