Columbia subject headings:
Ethnology--Laos.
Laos--Economic conditions.
Laos--Social conditions.
Roads--Design and construction--Social aspects.
Harvard subject headings:
Ethnology--Laos
Laos--Rural conditions.
Rural development--Laos.
Princeton subject headings:
Ethnology--Laos.
Laos--Rural conditions.
Rural development--Laos--Social aspects.