@conference {943,
	title = {Recalibration of IRT item parameters in CAT: Sparse data matrices and missing data treatments},
	booktitle = {Paper presented at the annual meeting of the National Council on Measurement in Education},
	year = {2003},
	note = {(PDF file, 626 K},
	address = {Chicago IL},
	author = {Harmes, J. C. and Parshall, C. G. and Kromrey, J. D.}
}
