TY  - RPRT
TI  - Spectrum formation in stars with steady-state extended atmospheres 
AU  - Groth, H G
AU  - Wellmann, P
PY  - 1970
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS SP 332
DO  - 10.6028/NBS.SP.332
ER  -