@book{72520,
	author = {Gupta, S.L. and Kumar, V.},
	title = {Classical Mechanics /},
	publisher = {Pragati,},
	year = {1993-94.},
	address = {India :},
	edition = {11th  ed.},
	note = {Reprint of the ed. published by Wiley, New York.}
}