Geologic map of Riley County, Kansas, 1995 [cartographic material] / by Brian D. Smith, Allen W. Archer ; computer compilation and cartography by Jorgina A. Ross, Cynthia L. Weeks ; Kansas Geological Survey, University of Kansas
Scale 1:50,000 ; Lambert conformal conic projection with standard parallels at 33 0 and 45 0. (W 96 0574́0-̋-W 96 0232́5/̋N 39 0335́9-̋-N 39 0255́4)̋.
Includes location map, index to 1:24,000-scale topographic maps used for base map, conversion table, and notes. and "This map was produced by computer-aided cartography using GIMMAP (Geodata Interactive Management Map Analysis and Production) system developed and used at the Kansas Geological Survey, written principally by Charles G. Ross."