Columbia subject headings:
Pliny, the Elder--Concordances.
Pliny, the Elder. De medicina libri tres.
Harvard subject headings:
Medicine, Greek and Roman.
Pliny, the Elder--Concordances.
Pliny, the Elder. De medicina libri tres.
Princeton subject headings:
Medicina Plinii--Concordances.
Pliny, the Younger--Concordances.
Pliny, the Younger--Language--Word frequency.