TY - JOUR
AU - David Hummer
AU - G. Rybicki
BT - Annual Review of Astronomy and Astrophysics
DA - Jan-09-1971
DO - 10.1146/annurev.aa.09.090171.001321
PY - 1971
SP - 237
EP - 270
T2 - Annual Review of Astronomy and Astrophysics
TI - The Formation of Spectral Lines
VL - 9
SN - 0066-4146
ER -