TY - CONF T1 - Calibrating CAT pools and online pretest items using marginal maximum likelihood methods T2 - Paper presented at the annual meeting of the National Council on Measurement in Education Y1 - 2003 A1 - Pommerich, M A1 - Segall, D. O. JF - Paper presented at the annual meeting of the National Council on Measurement in Education CY - Chicago IL N1 - {PDF file, 284 KB} ER -