1984. Lively, R. S., Morey, G.B., Mossler, John H., Ojakangas, Richard W., Southwick, David L., and Weber, R.E. (Geologist). Generalized interpretations of bedrock geology (distribution of rock at the land surface and beneath surface sediments) of the North Limb, Cottonwo... Minnesota Geological Survey.
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1382. Sibley County, Minnesota
1907. Shedd & Wright Mfg. Co. Cartographic Details: Scale not given. Townships shown in color, includes grid lines, cities, schools, churches, creameries, "rural routes," and bo... Shedd & Wright (Austin, Minnesota), 1907.
1982. Chandler, Val W. Bouguer gravity anomaly map (anomaly related to different densities of rocks in the upper crust, Bouguer anomaly is a corrected difference between ... Minnesota Geological Survey.
1978. Ervin, C. Patrick, McGinnis, Lyle D. (Lyle David), 1931-2017, and Steffy, D.A. Bouguer gravity anomaly map (anomaly related to different densities of rocks in the upper crust, Bouguer anomaly is a corrected difference between ... Minnesota Geological Survey.
1978. Ervin, C. Patrick, Jackson, J. K. (Jeffrey K.), and McGinnis, Lyle D. (Lyle David), 1931-2017. Bouguer gravity anomaly map (anomaly related to different densities of rocks in the upper crust, Bouguer anomaly is a corrected difference between ... Minnesota Geological Survey.
1977. Ervin, C. Patrick and Krenz, Kelly A. Bouguer gravity anomaly map (anomaly related to different densities of rocks in the upper crust, Bouguer anomaly is a corrected difference between ... Minnesota Geological Survey.
1968. Ikola, R.J. Bouguer gravity anomaly map (anomaly related to different densities of rocks in the upper crust, Bouguer anomaly is a corrected difference between ... Minnesota Geological Survey.
1985. Chandler, Val W., Ikola, Rodney J., and Jirsa, Mark A. Bouguer gravity anomaly map (anomaly related to different densities of rocks in the upper crust, Bouguer anomaly is a corrected difference between ... Minnesota Geological Survey.
1987. Chandler, Val W., Ferderer, Robert J., and Mills, Sarah J. Bouguer gravity anomaly map (anomaly related to different densities of rocks in the upper crust, Bouguer anomaly is a corrected difference between ... Minnesota Geological Survey.
1980. Ervin, C. Patrick, Ikola, Rodney J., and McGinnis, Lyle D. (Lyle David), 1931-2017. Bouguer gravity anomaly map (anomaly related to different densities of rocks in the upper crust, Bouguer anomaly is a corrected difference between ... Minnesota Geological Survey.