Columbia subject headings:
Mennonites--Political activity--Canada--History.
Mennonites--Political activity--Europe--History.
Mennonites--Political activity--Russia--History.
Harvard subject headings:
Mennonites--Canada--Political activity--History.
Mennonites--Europe--Political activity--History.
Mennonites--Russia--Political activity--History.
Princeton subject headings:
Mennonites--Political activity--Canada--History.
Mennonites--Political activity--Europe--History.
Mennonites--Political activity--Russia--History.