Columbia subject headings:
Harvard subject headings:
Drug traffic--Spain--País Vasco.
Mafia--Spain--País Vasco.
País Vasco (Spain)--Social conditions--20th century.
País Vasco (Spain)--Social conditions--21st century.
Police corruption--Spain--País Vasco.
Princeton subject headings:
Drug traffic--Spain--País Vasco.
Mafia--Spain--País Vasco.
País Vasco (Spain) ǂx Social conditions--20th century.
País Vasco (Spain) ǂx Social conditions--21st century.
Police corruption--Spain--País Vasco.