@book{3500,
	author = {Mendham, J...[etal.] and Denney, R. C; Barnes, J. D ; Thomas, M. and Sivasankar, B.},
	title = {Vogel's textbook of quantitative chemical analysis /},
	publisher = {Person Education,},
	year = {c2009.},
	address = {New Delhi,},
	edition = {6 th.}
}