Columbia subject headings:
Air--Pollution--India--Farīdābād.
Air--Pollution--India--Vārānasi.
Urban agriculture--India--Farīdābād.
Urban agriculture--India--Vārānasi.
Harvard subject headings:
Air--Pollution--India--Faridabad.
Air--Pollution--India--Varanasi.
Air--Pollution--India--Vārānasi (Uttar Pradesh)
Farīdābād (India)--Social conditions.
Urban agriculture--India--Faridabad.
Urban agriculture--India--Varanasi.
Urban agriculture--India--Vārānasi (Uttar Pradesh)
Vārānasi (Uttar Pradesh, India)--Social conditions.
Vārāṇasī (India)--Social conditions.
Princeton subject headings:
Air--Pollution--India--Faridabad.
Air--Pollution--India--Varanasi.
Farīdābād (India)--Social conditions.
Urban agriculture--India--Faridabad.
Urban agriculture--India--Varanasi.
Varanasi (India)--Social conditions.