CHEMICAL ABUNDANCES OF PLANETARY-NEBULAE

[11] ALLER LH, 1968, 34 IAU S, P209

[12] ALLER LH, 1968, NEBULAE INTERSTELLAR, P483

[13] ALLER LH, 1965, LANDOLT BORNSTEIN TA, P566

[14] FILAMENTARY STRUCTURE IN PLANETARY-NEBULAE [J]. ASTROPHYSICAL JOURNAL, 1974, 187 (02) : 283 - 298

[15] BOESHAAR GO, IN PRESS

[16] Bowen I. S., 1939, LICK OBS B, V19, P1

[17] CALCULATIONS OF LEVEL POPULATIONS FOR LOW LEVELS OF HYDROGENIC IONS IN GASEOUS NEBULAE [J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1971, 153 (04) : 471 - +

[18] LINE SPECTRA OF HELIUM IN GASEOUS NEBULAE [J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1972, 157 (02) : 211 - +

[19] ABUNDANCES AND IONIZATION DISTRIBUTION IN PLANETARY-NEBULAE [J]. ASTROPHYSICAL JOURNAL, 1973, 180 (03) : 817 - 830

[20] DISTANCES AND DISTRIBUTION OF PLANETARY NEBULAE [J]. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 1971, 22 : 319 - &

[11] ALLER LH, 1968, 34 IAU S, P209

[12] ALLER LH, 1968, NEBULAE INTERSTELLAR, P483

[13] ALLER LH, 1965, LANDOLT BORNSTEIN TA, P566

[14] FILAMENTARY STRUCTURE IN PLANETARY-NEBULAE [J]. ASTROPHYSICAL JOURNAL, 1974, 187 (02) : 283 - 298

[15] BOESHAAR GO, IN PRESS

[16] Bowen I. S., 1939, LICK OBS B, V19, P1

[17] CALCULATIONS OF LEVEL POPULATIONS FOR LOW LEVELS OF HYDROGENIC IONS IN GASEOUS NEBULAE [J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1971, 153 (04) : 471 - +

[18] LINE SPECTRA OF HELIUM IN GASEOUS NEBULAE [J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1972, 157 (02) : 211 - +

[19] ABUNDANCES AND IONIZATION DISTRIBUTION IN PLANETARY-NEBULAE [J]. ASTROPHYSICAL JOURNAL, 1973, 180 (03) : 817 - 830

[20] DISTANCES AND DISTRIBUTION OF PLANETARY NEBULAE [J]. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 1971, 22 : 319 - &