Columbia subject headings:
Diogenes Laertius. Vitis philosophorum.
Plato.
Posidonius.
Harvard subject headings:
Diogenes Laertius. Lives, teachings, and sayings of famous philosophers.
Plato
Posidonius.
Princeton subject headings:
Diogenes Laertius. Lives, teachings, and sayings of famous philosophers.
Plato.
Posidonius.