Columbia subject headings:
Aude (France : Department)--Social conditions.
Hat trade--France--Aude.
Social change--Case studies.
Harvard subject headings:
Aude (France : Department)--Social conditions.
Hat trade--France--Aude.
Social change--Case studies
Princeton subject headings:
Aude (France : Department)--Social conditions.
Case studies.
Hat trade--France--Aude.
Social change--Case studies.