THE STRUCTURE OF THE PLANETARY NEBULA IC-418

[1] Physical processes in gaseous nebulae XIV. Spectrophotometry of some typical planetary nebulae [J]. ASTROPHYSICAL JOURNAL, 1941, 93 (02) : 236 - 243

[2] THE STRUCTURAL FEATURES OF CERTAIN PLANETARY NEBULAE [J]. ASTRONOMICAL JOURNAL, 1950, 55 (03) : 70 - 70

[3] BERMAN L, 1937, LICK OBS B, V18, P57

[4] BERMAN L, 1930, LICK OBS B, V15, P86

[5] BUCERIUS H, 1931, AN, V244, P59

[6] ON THE INTEGRAL EQUATION GOVERNING THE DISTRIBUTION OF THE TRUE AND THE APPARENT ROTATIONAL VELOCITIES OF STARS [J]. ASTROPHYSICAL JOURNAL, 1950, 111 (01) : 142 - 156

[7] Curtis H.D., 1918, PUBLICATIONS LICK OB, V13, P55

[8] Physical processes in gaseous nebulae X. Collisional excitation of nebulium [J]. ASTROPHYSICAL JOURNAL, 1940, 92 (03) : 408 - 423

[9] Physical processes in gaseous nebulae XII. The electron densities of some bright planetary nebulae [J]. ASTROPHYSICAL JOURNAL, 1941, 93 (01) : 195 - 201

[10] MENZEL DH, 1937, AP J, V85, P333

[1] Physical processes in gaseous nebulae XIV. Spectrophotometry of some typical planetary nebulae [J]. ASTROPHYSICAL JOURNAL, 1941, 93 (02) : 236 - 243

[2] THE STRUCTURAL FEATURES OF CERTAIN PLANETARY NEBULAE [J]. ASTRONOMICAL JOURNAL, 1950, 55 (03) : 70 - 70

[3] BERMAN L, 1937, LICK OBS B, V18, P57

[4] BERMAN L, 1930, LICK OBS B, V15, P86

[5] BUCERIUS H, 1931, AN, V244, P59

[6] ON THE INTEGRAL EQUATION GOVERNING THE DISTRIBUTION OF THE TRUE AND THE APPARENT ROTATIONAL VELOCITIES OF STARS [J]. ASTROPHYSICAL JOURNAL, 1950, 111 (01) : 142 - 156

[7] Curtis H.D., 1918, PUBLICATIONS LICK OB, V13, P55

[8] Physical processes in gaseous nebulae X. Collisional excitation of nebulium [J]. ASTROPHYSICAL JOURNAL, 1940, 92 (03) : 408 - 423

[9] Physical processes in gaseous nebulae XII. The electron densities of some bright planetary nebulae [J]. ASTROPHYSICAL JOURNAL, 1941, 93 (01) : 195 - 201

[10] MENZEL DH, 1937, AP J, V85, P333