Numerous USGS publications are no longer available in printed form. To make these reports available to the public, the USGS has begun the legacy documents program. Scanned images of the original documents are available for viewing or for downloading in PDF format.
- Tibbals, CH., 1977, Availability of ground water in Seminole County and vicinity, Florida: U.S. Geological Survey Water-Resources Investigations WRIR-76-97.
- Rutledge A.T., 1985, Ground-Water Hydrology of Volusia County, Florida, with emphasis on occurrence and movement of brackish water: U.S. Geological Survey Water-Resources Investigations WRIR-84-4206.
- Schiffer, D.M., 1996, Effects of Three Highway-runoff Detention Methods on Water Qualtity of the Surficial Aquifer System in Central Florida: U.S. Geological Survey Water-Resources Investigations WRIR-88-4170.