Columbia subject headings:
B stars--Congresses.
Planetary nebulae--Congresses.
R Coronae Borealis stars--Congresses.
Stars--Atmospheres--Congresses.
White dwarf stars--Congresses.
Harvard subject headings:
B stars--Congresses.
Planetary nebulae--Congresses.
R Coronae Borealis stars--Congresses.
Stars--Atmospheres--Congresses
White dwarf stars--Congresses.
Princeton subject headings:
B stars--Congresses.
Planetary nebulae--Congresses.
R Coronae Borealis stars--Congresses.
Stars--Atmospheres--Congresses.
White dwarf stars--Congresses.