The origin of the nebular lines and the structure of the planetary nebulae

[1] *ASTR SOC PAC, 1920, PUBL ASTRON SOC PAC, V32, P63

[2] *ASTR SOC PAC, 1927, PUBL ASTRON SOC PAC, V39, P295

[3] BOWEN, 1927, PHYS REV, V29, P231

[4] CROZE, 1927, COMPTES RENDUS, V185, P702

[5] FOWLER, 1927, NATURE, V120, P617

[6] *LICK OBS, 1918, PUBL LICK OBS, V13, P193

[7] RUSSELL, IN PRESS PHYS REV

[8] RUSSELL, 1927, ASTRONOMY, P837

[9] 1927, P ROYAL SOC, V114, P662

[10] 1927, ASTROPHYSICAL J, V65, P1

[1] *ASTR SOC PAC, 1920, PUBL ASTRON SOC PAC, V32, P63

[2] *ASTR SOC PAC, 1927, PUBL ASTRON SOC PAC, V39, P295

[3] BOWEN, 1927, PHYS REV, V29, P231

[4] CROZE, 1927, COMPTES RENDUS, V185, P702

[5] FOWLER, 1927, NATURE, V120, P617

[6] *LICK OBS, 1918, PUBL LICK OBS, V13, P193

[7] RUSSELL, IN PRESS PHYS REV

[8] RUSSELL, 1927, ASTRONOMY, P837

[9] 1927, P ROYAL SOC, V114, P662

[10] 1927, ASTROPHYSICAL J, V65, P1