1. American Petroleum Institute 2000 No-Purge Ground Water Sampling: An Approach for Long Term Monitoring C.J. Newell R.S. Lee A.H. Spexey American Petroleum Institute
2. Well construction and purging effects on ground-water samples;Barcelona;Environmental Science and Technology,1986
3. Barcelona , M.J. J.P. Gibb J.A. Helfirch E.E. Garske 1985 Practical guide for ground water sampling U.S. EPA
4. Barcelona , M.J. J.P. Gibb R.A. Miller 1983 A guide to the selection of materials for monitoring well construction and ground water sampling U.S. EPA