@book{4947,
	author = {Rahman, Atta-ur-, and Ahmad, Viqar Uddin.},
	title = {¹³C-NMR of natural products :},
	publisher = {Plenum Press,},
	year = {c1992.},
	address = {New York :},
	url = {http://www.loc.gov/catdir/enhancements/fy0820/91010877-d.html}
}