Columbia subject headings:
Agricultural laws and legislation--Minnesota--History.
Civil rights--Minnesota--History.
Farmers--Minnesota--Political activity--History.
Farmers--Political activity--Minnesota--History.
National Nonpartisan League--History.
Harvard subject headings:
Agricultural laws and legislation--Minnesota--History.
Civil rights--Minnesota--History.
Farmers--Minnesota--Political activity--History.
National Nonpartisan League--History.
Princeton subject headings: