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Livestock Confinement An Introduction to Hogs in Iowa Geologic Mapping Using GIS Technology Assists in the Siting of Animal Confinement Operations and Manure Application Areas (Abstract) Groundwater Monitoring at an Earthen Manure-Storage Structure (May 1996) Groundwater Monitoring at Earthen Manure-Storage Structures in Iowa (February 1998) Groundwater Monitoring at Earthen Manure-Storage Structures in Iowa (September 1998) Siting of Animal Confinement Operations and Manure Application Areas:  A GIS Analysis of Geology and Soils Groundwater Protection and Manure Management (Abstract) Manure Management to Protect Water Resources (Iowa Geology, 1999)