Columbia subject headings:
Thales, approximately 634 B.C.-approximately 546 B.C.
Harvard subject headings:
Philosophy, Ancient.
Pre-Socratic philosophers.
Thales, approximately 634 B.C.-approximately 546 B.C.
Princeton subject headings:
Pre-Socratic philosophers.
Thales, approximately 634 B.C.-approximately 546 B.C.