"This study was supported by Contract/Grant No. REC-9815157 between the National Academy of Sciences and the National Science Foundation and the U.S. Department of Education, National Center for Education Statistics"--T.p. verso
Includes bibliographical references (p. 74-80)
Electronic reproduction. Ann Arbor, MI : ProQuest, 2016. Available via World Wide Web. Access may be limited to ProQuest affiliated libraries