Lawrence Section map: 31-12-20; Lawrence Section map: 25-12-19; Lawrence Section map: 36-12-19; Map of Douglas County, Kansas, June 1974; Map of Jefferson County, Kansas, April 1, 1970; Photocopy of Lawrence Map [3 sheets]; Geological Survey, Lawrence West Quadrangle, revised 1978; Geological Survey, Williamstown Quadrangle, revised 1978; County Commission Districts, revised June 24, 1997; Douglas County, Kansas, Wakarusa Township, revised December 31, 1996; Lawrence, updated December 31, 1993