1. Creation of an artificially produced fracture zone to prevent contaminated ground-water migration;Begor;Ground Water,1989
2. What has gone wrong;Freeze;Ground Water,1989
3. U.S. EPA. 1989a Considerations in Ground Water Remediation at Superfund Sites
4. U.S. EPA. 1989b Evaluation of Ground Water Extraction Remedies
5. U.S. EPA. 1990a Evaluation of Ground Water Extraction Remedies