Spectral energy-curve of sun-spots

[1] RUSSELL, 1926, ASTRONOMY, V1, P200

[2] *SM I, 1908, ANN ASTR OBS, V2, P233

[3] *SM I, 1913, ANN ASTR OBS, V3, P159

[4] YOUNG, 1910, SUN, P116

[5] 1875, SOLEIL, V1, P81

[6] 1925, J OPTICAL SOC AM, V10, P267

[7] 1928, ASTROPHYSICAL J, V68, P297

[8] 1928, ASTROPHYSICAL J, V68, P289

[9] 1927, ASTROPHYSICAL J, V66, P43

[10] 1929, SUN, P107

[1] RUSSELL, 1926, ASTRONOMY, V1, P200

[2] *SM I, 1908, ANN ASTR OBS, V2, P233

[3] *SM I, 1913, ANN ASTR OBS, V3, P159

[4] YOUNG, 1910, SUN, P116

[5] 1875, SOLEIL, V1, P81

[6] 1925, J OPTICAL SOC AM, V10, P267

[7] 1928, ASTROPHYSICAL J, V68, P297

[8] 1928, ASTROPHYSICAL J, V68, P289

[9] 1927, ASTROPHYSICAL J, V66, P43

[10] 1929, SUN, P107