U.S. Geological Survey2024-08-262024-10-152024-08-262024-10-15195030002008806671https://hdl.handle.net/11285/695758Escala 1: 24,000 proyección polyconica1 mapaengopenAccesshttp://creativecommons.org/licenses/by-nc-nd/4.0Gaveta 3G4100.G4 1950Illinois-Mapas topográficosMissouri-Mapas topográficosAlton Quadrangle, Illinois-Missouri: 7.5 minute series (topographic)mapped, edited and published by the Geological SurveyImagenTIFF, PDFb12579695i35380949IllinoisTopografíaHidrologíaPlanoCampus Norte68 x 56 cm.