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