1996. Alexander, E. C., Jr., Falteisek, Jan, and Witthuhn, Kathleen, M. Map showing location of sinkholes and likelihood of future sinkhole development, scale 1:100,000, Fillmore County. Minnesota Department of Natural Resources, Division of Waters.
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1996. Alexander, E. C., Jr., Alexander, Scott C. (Geologist), Falteisek, Jan, Green, Jeffrey A., and Spong, Ronald C. Map showing the locations of springs and seeps and the interaction of surface drainage, karst (carbonate rock with caves, springs) ground water and... Minnesota Department of Natural Resources, Division of Waters.
2003. Alexander, E. C., Jr., Berner, David J., Falteisek, Jan, Gao, Yongli, and Green, Jeffrey A. Maps showing distribution of karst (carbonate rock with caves, springs) units and features and karst hydrology in carbonate rocks susceptible to be... Minnesota Department of Natural Resources, Division of Waters.
2002. Alexander, E. C., Jr., Alexander, Scott C. (Geologist), Falteisek, Jan, Green, Jeffrey A., and Marken, William J. Maps showing distribution of karst (carbonate rock with caves, springs) units and features and karst hydrology in carbonate rocks susceptible to be... Minnesota Department of Natural Resources, Division of Waters.