Columbia subject headings:
Aristotle.
Ether (Space)
Philoponus, John, active 6th century. Aeternitate mundi contra Aristotelem.
Theory of ether (of space)
Harvard subject headings:
Aristotle--Contributions in theory of ether (of space)
Ether (Space)
Philoponus, John, active 6th century. De aeternitate mundi contra Aristotelem.
Princeton subject headings:
Aristotle.
Ether (Space)
Philoponus, John, active 6th century. De aeternitate mundi contra Aristotelem.