@booklet {1606,
	title = {Unidimensional approximations for a computerized adaptive test when the item pool and latent space are multidimensional (Research Report 97-5)},
	year = {1997},
	address = {Iowa City IA: ACT Inc},
	author = {Spray, J. A. and Abdel-Fattah, A. A. and Huang, C.-Y. and Lau, CA}
}
