Columbia subject headings:
Agriculture--Early works to 1800--Bibliography.
Cato, Marcus Porcius, 234 B.C.-149 B.C.--Bibliography.
Harvard subject headings:
Agriculture--Early works to 1800--Bibliography.
Cato, Marcus Porcius, 234 B.C.-149 B.C.--Bibliography.
Cato, Marcus Porcius, 234-149 B. C.--Bibliography.
Princeton subject headings:
Cato, Marcus Porcius, 234 B.C.-149 B.C.--Bibliography.