Columbia subject headings:
Grotius, Hugo, 1583-1645. De jure belli ac pacis libri tres.
Harvard subject headings:
Grotius, Hugo, 1583-1645. De jure belli ac pacis libri tres.
International law--Early works to 1800.
Natural law--Early works to 1800.
War (International law)--Early works to 1800.
Princeton subject headings:
Grotius, Hugo, 1583-1645. De jure belli ac pacis libri tres.