Butterflies of Marion County - Presents photos and species accounts of butterflies found within the county. www.npwrc.usgs.gov/resource/distr/lepid/bflyusa/chklist/states/counties/oh_101.htm
Marion County Extension Office - Branch office of Ohio State University, it combines the needs of local citizens and communities, with new research and technical information about agriculture. marion.osu.edu
Marion County Ground - Water Resources - Factsheet providing information on ground-water resources in the county. ohioline.osu.edu/aex-fact/0490_51.html
Water Resources of Marion County - Factsheet providing information on water resources and drinking-water quality in the county. ohioline.osu.edu/aex-fact/0480_51.html
