Columbia subject headings:
Forest surveys--Black Hills National Forest (S.D. and Wyo.)
Forests and forestry--Black Hills National Forest (S.D. and Wyo.)--Statistics.
Timber--Black Hills National Forest (S.D. and Wyo.)--Statistics.
Harvard subject headings:
Forest surveys--Black Hills National Forest (S.D. and Wyo.)
Forests and forestry--Black Hills National Forest (S.D. and Wyo.)--Statistics.
Timber--Black Hills National Forest (S.D. and Wyo.)--Statistics.
Princeton subject headings: