Columbia subject headings:
Harvard subject headings:
Cosmology.
Harmony of the spheres.
Kepler, Johannes, 1571-1630.
Mersenne, Marin, 1588-1648.
Princeton subject headings:
Cosmology.
Harmony of the spheres.
Kepler, Johannes, 1571-1630.
Mersenne, Marin, 1588-1648.