@book{3390,
	author = {Vasishtha, A. R. and Vasishtha, Vipin.},
	title = {Calculus of finite differences and numerical analysis :},
	publisher = {Kedar nath ram nath, },
	year = {c1992.},
	address = {New Delhi. :},
	note = {for degree, post graduate and engineering students of all Indian Universities.}
}