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The complete Illustrated Glossary of Drillers Terms, by Marvin Glotfelty, Sheryl Gordon, and Ron Peterson, is available for purchase at the National Ground Water Association web site. This glossary includes over 650 defined terms and about 100 photographs. All of the authorship royalties (15% of annual glossary sales revenue) have been contributed by the authors to the Arizona Water Well Association and the Arizona Hydrological Society.