O'Brien/Huston, The NICHD Study of Early Child Care, Kansas Site, KU# 4896-9, Correspondence, November 1, 1997, Box: 54, Folder: 9. University of Kansas Schiefelbusch Institute for Life Span Studies records, RG 35. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/455199 Accessed June 02, 2024.