TY - JOUR AU - Roy Garstang BT - Journal of the Optical Society of America B DA - Jan-01-1984 DO - 10.1364/JOSAB.1.000311 PY - 1984 EP - 311 T2 - Journal of the Optical Society of America B TI - Hyperfine structure and the broadening of sunspot spectral lines VL - 1 SN - 0740-3224 ER -