Columbia subject headings:
Education, Rural--Mexico--Quintana Roo (State)--20th century--History.
Education--Mexico--Quintana Roo (State)--20th century--History.
Rural schools--Mexico--Quintana Roo (State)--20th century--History.
Teachers--Training of--20th century--Mexico--Quintana Roo (State)--History.
Harvard subject headings:
Education and state--Mexico--Quintana Roo (State)--History--20th century.
Education, Rural--Mexico--Quintana Roo (State)--History--20th century.
Public schools--Mexico--Quintana Roo (State)--History--20th century.
Princeton subject headings:
Education and state--Mexico--Quintana Roo (State)--History--20th century.
Education, Rural--Mexico--Quintana Roo (State)--History--20th century.
Public schools--Mexico--Quintana Roo (State)--History--20th century.