Columbia subject headings:
Dakota Indians--Missions.
Riggs, Stephen Return, 1812-1883.
Harvard subject headings:
Dakota Indians--Missions
Missionaries--West (U.S.)--Biography.
Riggs, Mary Ann, -1869.
Riggs, Stephen Return, 1812-1883
Princeton subject headings:
Dakota Indians--Missions.
Riggs, Stephen Return, 1812-1883.