Columbia subject headings:
Astrophysics--Handbooks, manuals, etc.
Space astronomy--Handbooks, manuals, etc.
Harvard subject headings:
Astronomy--Handbooks, manuals, etc.
Astrophysics--Handbooks, manuals, etc.
Princeton subject headings:
Astronomy--Handbooks, manuals, etc.
Astrophysics--Handbooks, manuals, etc.