@book{89902,
	author = {Das, Sukla},
	title = {Socio-economic life of northern India, c. A.D. 550 to A.D. 650 /},
	publisher = {Abhinav Publications,},
	year = {1980.},
	address = {New Delhi :},
	edition = {1st ed.},
	note = {Originally presented as the author's thesis, Jadavpur University.}
}