@book{18749,
	author = {Branford, Benchara. and Bidder, George Parker,},
	title = {A study of mathematical education including the teaching of arithmetic,},
	publisher = {Clarendon press,},
	year = {1908.},
	address = {Oxford,},
	note = {"How a famous engineer [Bidder] taught himself arithmetic": chap. VII.}
}