Studies of diffuse nebulae

[1] *DOM AP OBS, 1928, PUB DOM AP OBS VICT, V4, P187

[2] GREENSTEIN, 1937, AP J, V86, P620

[3] GREENSTEIN, 1938, AP J, V88, P605

[4] GREENSTEIN, 1938, AP J, V87, P79

[5] *LICK OBS, 1935, LICK OBS B, V17, P179

[6] STEBBINS, 1933, PUB WASHBURN OBS, V15

[7] 1938, AP J, V88, P52

[8] 1936, MN, V96, P771

[1] *DOM AP OBS, 1928, PUB DOM AP OBS VICT, V4, P187

[2] GREENSTEIN, 1937, AP J, V86, P620

[3] GREENSTEIN, 1938, AP J, V88, P605

[4] GREENSTEIN, 1938, AP J, V87, P79

[5] *LICK OBS, 1935, LICK OBS B, V17, P179

[6] STEBBINS, 1933, PUB WASHBURN OBS, V15

[7] 1938, AP J, V88, P52

[8] 1936, MN, V96, P771