Columbia subject headings:
Harvard subject headings:
Astronomy--Calendars.
Astronomy--Charts, diagrams, etc.
Constellations--Charts, diagrams, etc.
Planets--Charts, diagrams, etc.
Princeton subject headings:
Almanacs, American--Pennsylvania--Philadelphia.
Astronomy--Calendars.
Astronomy--Charts, diagrams, etc.
Astronomy--Periodicals.
Ephemerides--Periodicals.
Periodicals.
Planets--Charts, diagrams, etc.