Norman Hillmer has written:

'Empire to umpire' -- subject(s): Foreign relations, Canada, United States, Great Britain

'Empire to umpire : Canada and the world to the 1990s' -- subject(s): Foreign relations, United States

Arnold Heeney has written:

'Canada and the United States' -- subject(s): Relations

Canada and the United States are north of Mexico and in North America.

William B. Ellison has written:

'The political unification of the United States and Canada' -- subject(s): Foreign relations, Canada

Canada is not in the United States