Color indices of reflection nebulae

[1] DEJARDIN, 1936, REV MOD PHYS, V8, P223

[2] DEJARDIN, 1936, REV MOD PHYS, V8, P14

[3] DEJARDIN, 1936, REV MOD PHYS, V8, P406

[4] SHAJN, 1934, Z AP, V8, P168

[5] STRUVE, 1936, AP J, V84, P224

[6] 1920, AP J, V52, P8

[7] 1915, AP J, V42, P120

[8] 1933, AP J, V77, P274

[9] HDB ASTROPHYSIK 2, V1, P232

[10] 1936, AP J, V84, P203

[1] DEJARDIN, 1936, REV MOD PHYS, V8, P223

[2] DEJARDIN, 1936, REV MOD PHYS, V8, P14

[3] DEJARDIN, 1936, REV MOD PHYS, V8, P406

[4] SHAJN, 1934, Z AP, V8, P168

[5] STRUVE, 1936, AP J, V84, P224

[6] 1920, AP J, V52, P8

[7] 1915, AP J, V42, P120

[8] 1933, AP J, V77, P274

[9] HDB ASTROPHYSIK 2, V1, P232

[10] 1936, AP J, V84, P203