Columbia subject headings:
Patagonia (Argentina and Chile)--Politics and government--20th century.
Patagonia (Argentina and Chile)--Social conditions--20th century.
Harvard subject headings:
Neuquén (Argentina : Province)--Politics and government--20th century.
Neuquén (Argentina : Province)--Social conditions--20th century.
Río Negro (Argentina)--Politics and government--20th century.
Río Negro (Argentina)--Social conditions--20th century.
Princeton subject headings:
Neuquén (Argentina : Province)--Politics and government--20th century.
Neuquén (Argentina : Province)--Social conditions--20th century.
Río Negro (Argentina)--Politics and government--20th century.
Río Negro (Argentina)--Social conditions--20th century.