Columbia subject headings:
Polish people--Germany--History--Sources.
Scouting (Reconnaissance)--Germany--History--Sources.
Scouting (Reconnaissance)--Poland--History--Sources.
Scouting (Youth activity)--Germany--History--Sources.
Scouting (Youth activity)--Poland--History--Sources.
Scouts (Reconnaissance)--Germany--History--Sources.
Scouts (Reconnaissance)--Poland--History--Sources.
Scouts (Youth organization members)--Germany--History--Sources.
Scouts (Youth organization members)--Poland--History--Sources.
Związek Harcerstwa Polskiego w Niemczech--History--Sources.
Harvard subject headings:
Polish people--Germany--History--Sources.
Scouting (Youth activity)--Germany--History--Sources.
Scouting (Youth activity)--Poland--History--Sources.
Związek Harcerstwa Polskiego w Niemczech--History--Sources.
Princeton subject headings: