@book{686,
	author = {Vogel, Arthur I and Medham, J.},
	title = {Vogel's Textbook of Quantitative Chemical Analysis /},
	publisher = {Dorling Kindersley (India) Pvt Ltd,},
	year = {2009, reprinted 2012},
	address = {Noida :},
	edition = {6th ed.}
}