@conference {1001, title = {Integrating stratification and information approaches for multiple constrained CAT}, booktitle = {Paper presented at the Annual Meeting of the National Council on Measurement in Education}, year = {2001}, note = {{PDF file, 322 KB}}, address = {Seattle WA}, author = {Leung, C.-I. and Chang, Hua-Hua and Hau, K-T.} }