@article {789,
	title = {The College Board computerized placement tests: An application of computerized adaptive testing},
	journal = {Machine-Mediated Learning},
	volume = {2},
	year = {1988},
	pages = {271-282},
	author = {W. C. Ward}
}
@booklet {1561,
	title = {College Board computerized placement tests: Validation of an adaptive test of basic skills (Research Report 86-29)},
	year = {1986},
	address = {Princeton NJ:  Educational Testing Service.},
	author = {W. C. Ward and Kline, R. G. and Flaugher, J.}
}
