Geophysical signature of Pliocene reef limestones using direct current and electromagnetic resistivity survey methods, Collier County, Florida   Publication Date:   1982-07 Creator:   South Florida Water Management District ( Contributor ) Layton, Michael C. Stewart, Mark T. Publisher.Display:   South Florida Water Management District Format:   PDF, 83 pages, illustrations, charts, maps Subjects.Display:   Collier County (Fla.) Groundwater -- Florida -- Collier County Source Institution:   Florida International University Geophysical signature of Pliocene reef limestones using direct current and electromagnetic resistivity survey methods, Collier County, Florida