Columbia subject headings:
Harvard subject headings:
Drug abuse--Africa, Portuguese-speaking--History--20th century.
Drug abuse--Portugal--History--20th century.
Soldiers--Alcohol use--Africa, Portuguese-speaking.
Soldiers--Alcohol use--Portugal.
Soldiers--Drug use--Africa, Portuguese-speaking.
Soldiers--Drug use--Portugal.
Princeton subject headings:
Drug abuse--Africa, Portuguese-speaking--History--20th century.
Drug abuse--Portugal--History--20th century.
Soldiers--Alcohol use--Africa, Portuguese-speaking.
Soldiers--Alcohol use--Portugal.
Soldiers--Drug use--Africa, Portuguese-speaking.
Soldiers--Drug use--Portugal.