@book{20308,
	author = {Singh, Chetan. and Indian Institute of Advanced Study.},
	title = {Natural premises :},
	publisher = {Oxford University Press,},
	year = {1998.},
	address = {Delhi :},
	note = {"Indian Institute of Advanced Study, Shimla."},
	url = {http://www.loc.gov/catdir/enhancements/fy0606/97914021-d.html}
}