Description
Item Description:"This study was supported by Contract Number RN96131001 between the National Academy of Sciences and the U.S. Department of Education. Support of the work of the Committee on National Statistics is provided by a consortium of federal agencies through a grant from the National Science Foundation (Number SBR-9709489)"--Title page verso.
Electronic resource.
Physical Description:xi, 256 pages : illustrations
Also available via the World Wide Web.
Bibliography:Includes bibliographical references (pages 256-250).
ISBN:0309501571 (electronic bk.)