@book{13470,
	author = {Bell, A.H..},
	title = {A Practical Course of Mathematics: Geometry, Algebra, Plane and Spherical Trigonometry, Calculus, Conics /},
	publisher = {Blackie & Sons Ltd ,},
	year = {1946.},
	address = {London :},
	edition = {1st ed. /}
}