48 hr recovery [data charts]
in Richard D. Walk Papers, of University of Akron. Cummings Center for the History of Psychology (1972); with Richard David Walk, 1920-1999, Series Four: Research Files, 1945-1997. Subseries One: Visual Cliff Research, 1958-1996, Box M4933, Folder 7: Visual cliff data, 1966 , 29 page(s)
