Columbia subject headings:
Boundary Waters Canoe Area (Minn.)
Forest ecology--Minnesota--Boundary Waters Canoe Area.
Forests and forestry--Minnesota--Boundary Waters Canoe Area.
Nature--Effect of human beings on--Minnesota--Boundary Waters Canoe Area.
Harvard subject headings:
Boundary Waters Canoe Area (Minn.)
Forest ecology--Minnesota--Boundary Waters Canoe Area (Minn.)
Forest ecology--Minnesota--Boundary Waters Canoe Area.
Forests and forestry--Minnesota--Boundary Waters Canoe Area.
Nature--Effect of human beings on--Minnesota--Boundary Waters Canoe Area.
Princeton subject headings: