5" below glass - 1966
in Richard D. Walk Papers, of University of Akron. Cummings Center for the History of Psychology (1966); with Richard David Walk, 1920-1999, Series Four: Research Files, 1945-1997. Subseries One: Visual Cliff Research, 1958-1996, Box M4929, Folder 6: Visual cliff data - babies (RESTRICTED), 1960-1963 , 1 page(s)
