Columbia subject headings:
Lajas (P.R.)--Economic conditions.
Lajas (P.R.)--History.
Lajas (P.R.)--Politics and government.
Lajas (P.R.)--Social conditions.
Harvard subject headings:
Lajas (P.R.)--Economic conditions--20th century.
Lajas (P.R.)--Religion.
Lajas (P.R.)--Social conditions--20th century.
Princeton subject headings:
Lajas (P.R.)--Economic conditions.
Lajas (P.R.)--History.
Lajas (P.R.)--Politics and government.
Lajas (P.R.)--Social conditions.