@book{166280,
	title = {Determination of seven trace elements in natural water by atomic absorption spectrophotometry after preconcentration on cation-exchange resin /},
	publisher = {University Of Dhaka, },
	year = {1987.},
	address = {Dhaka : },
	note = {Thesis (MS )-- Department of Chemstry, University of Dhaka,1987.}
}