Columbia subject headings:
Mexico--Foreign public opinion, German.
Mexico--History--European intervention, 1861-1867--Sources.
Harvard subject headings:
Mexico--Foreign opinion, German.
Mexico--Foreign public opinion, German.
Mexico--History--European intervention, 1861-1867--Sources.
Princeton subject headings:
Mexico--Foreign opinion, German.
Mexico--History--European intervention, 1861-1867--Sources.