Mossler, John H.. (2003). Bedrock geology of Mankato West quadrangle, Blue Earth, Le Sueur Counties, Minnesota, M-135. Minnesota Geological Survey. https://reflections.mndigital.org/catalog/mgs:852

Available from: https://geo.btaa.org/catalog/548b6713-39c9-4006-8d54-f67996234cf9