@book{38915,
	author = {Western Australia.},
	title = {100 mathematical problems for students aged 11 to 13 years /},
	publisher = {Mathematical Association of Western Australia,},
	year = {1980.},
	address = {[Perth, W.A.] :},
	note = {Available from The Secretary, Mathematical Association of Western Australia, c/- Mathematics Dept., University of Western Australia, Nedlands, W.A. 6009.}
}