1. (1988). Applied hydrogeology, 2nd edition. New York: Macmillan Publishing Company.
2. (1999). ECHOS environmental remediation cost data-Unit price, 5th annual edition.
3. (1999). Site work and landscape cost data, 18th annual edition.
4. Tetra Tech EM Inc. (2000). Solid waste disposal cost to RCRA landfill - compilation of 167 vendor quotes.
5. (1980). Groundwater hydrology, 2nd edition. New York: John Wiley and Sons.