Williams VSL, Billeaud K, Davis LA, Thissen D, Sanford EE. Projecting to the NAEP scale: results from the North Carolina end-of-grade testing program (Technical Report #34). 1995. Research Triangle Park, NC. National Institute of Statistical Sciences.
Williams VSL, Jones LV, Olkin I. Perspectives on statistics for education research: proceedings of a workshop (Technical Report #35). 1995. Research Triangle Park, NC. National Institute of Statistical Sciences.