Columbia subject headings:
Cabinet officers--Handbooks, manuals, etc.
Heads of state--Handbooks, manuals, etc.
Harvard subject headings:
Cabinet officers--Handbooks, manuals, etc.
Heads of state--Handbooks, manuals, etc.
Princeton subject headings:
Cabinet officers--Handbooks, manuals, etc.
Heads of state--Handbooks, manuals, etc.