1. Ackerman J (2019) Bat river—Bat counts, unpublished report, 3 p
2. Adams RS Jr, Grow S, Alexander EC Jr (1985) The presence of “apparent” atrazine in groundwater of southeastern Minnesota. A Report on Field Research, University of Minnesota Agricultural Experimental Station Miscellaneous Publication 2 (revised)-1985, p 160–162
3. Alexander EC Jr (1980a) Leslie Cave and Clarke Cave, Washington County. In: Alexander EC Jr (ed) An introduction to Caves of Minnesota, Iowa, and Wisconsin, Guidebook for the 1980 NSS Conv. Minn Geol Surv, St. Paul, p 79–83
4. Alexander EC Jr (1980b) Robinson’s Ice Cave, Pine County. In: Alexander EC Jr (ed) An introduction to Caves of Minnesota, Iowa, and Wisconsin, Guidebook for the 1980 NSS Conv. Minn Geol Surv, St. Paul, p 84–86
5. Alexander EC Jr (1980c) Stop #7. Altura Waste-Treatment Facility. In: Alexander EC Jr (ed) An introduction to Caves of Minnesota, Iowa, and Wisconsin, Guidebook for the 1980 NSS Conv Minn Geol Surv, St. Paul, p 178–183