TY - CONF T1 - Integrating stratification and information approaches for multiple constrained CAT T2 - Paper presented at the Annual Meeting of the National Council on Measurement in Education Y1 - 2001 A1 - Leung, C.-I. A1 - Chang, Hua-Hua A1 - Hau, K-T. JF - Paper presented at the Annual Meeting of the National Council on Measurement in Education CY - Seattle WA N1 - {PDF file, 322 KB} ER -