Columbia subject headings:
Middle class--Chile--Case studies.
Teachers--Chile--Economic conditions--Case studies.
Teachers--Chile--Social conditions--Case studies.
Harvard subject headings:
Middle class--Chile--Case studies.
Teachers--Chile--Economic conditions--Case studies.
Teachers--Chile--Social conditions--Case studies.
Princeton subject headings:
Case studies.
Middle class--Chile--Case studies.
Teachers--Chile--Economic conditions--Case studies.
Teachers--Chile--Social conditions--Case studies.