Columbia subject headings:
Astronomers--Great Britain.
Climatic changes.
Maunder, E. Walter (Edward Walter), 1851-1928.
Sun.
Sunspots.
Harvard subject headings:
Astronomers--Great Britain.
Climatic changes
Maunder, E. Walter (Edward Walter), 1851-1928.
Sun.
Sunspots.
Princeton subject headings:
Astronomers--Great Britain.
Climatic changes.
Maunder, E. Walter (Edward Walter), 1851-1928.
Sun.
Sunspots.