Columbia subject headings:
Agriculture--Economic aspects--India--Punjab--Case studies.
Green revolution--India--Punjab--Case studies.
Sikhs--India--Punjab--Case studies.
Villages--India--Punjab--Case studies.
Harvard subject headings:
Agriculture--Economic aspects--India--Punjab--Case studies.
Green Revolution--India--Punjab--Case studies.
Sikhs--India--Punjab--Case studies.
Villages--India--Punjab--Case studies.
Princeton subject headings:
Agriculture--Economic aspects--India--Punjab--Case studies.
Green Revolution--India--Punjab--Case studies.
Sikhs--India--Punjab--Case studies.
Villages--India--Punjab--Case studies.