THE STRUCTURE OF THE OWL NEBULA

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

[2] CURTIS HD, 1918, PUB LICK OBS 3, V13

[3] Herschel J. F. W., 1858, OUTLINES ASTRONOMY

[4] JONES RB, 1939, HARVARD C OBS B, V911, P11

[5] PHOTOELECTRIC SPECTROPHOTOMETRY OF PLANETARY NEBULAE [J]. ASTROPHYSICAL JOURNAL, 1954, 120 (01) : 48 - 57

[6] Physical processes in gaseous nebulae XIII. The electron temperatures of some typical planetary nebulae [J]. ASTROPHYSICAL JOURNAL, 1941, 93 (02) : 230 - 235

[7] Spectra of planetary nebulae of low surface brightness. [J]. ASTROPHYSICAL JOURNAL, 1942, 95 (02) : 243 - 247

[8] ELECTRON EXCITATION OF FORBIDDEN LINES OCCURRING IN GASEOUS NEBULAE [J]. PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL AND PHYSICAL SCIENCES, 1953, 218 (1134): : 400 - 416

[9] Williams R. C., 1940, PUB OBS U MICHIGAN, V8, P45

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

[2] CURTIS HD, 1918, PUB LICK OBS 3, V13

[3] Herschel J. F. W., 1858, OUTLINES ASTRONOMY

[4] JONES RB, 1939, HARVARD C OBS B, V911, P11

[5] PHOTOELECTRIC SPECTROPHOTOMETRY OF PLANETARY NEBULAE [J]. ASTROPHYSICAL JOURNAL, 1954, 120 (01) : 48 - 57

[6] Physical processes in gaseous nebulae XIII. The electron temperatures of some typical planetary nebulae [J]. ASTROPHYSICAL JOURNAL, 1941, 93 (02) : 230 - 235

[7] Spectra of planetary nebulae of low surface brightness. [J]. ASTROPHYSICAL JOURNAL, 1942, 95 (02) : 243 - 247

[8] ELECTRON EXCITATION OF FORBIDDEN LINES OCCURRING IN GASEOUS NEBULAE [J]. PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL AND PHYSICAL SCIENCES, 1953, 218 (1134): : 400 - 416

[9] Williams R. C., 1940, PUB OBS U MICHIGAN, V8, P45