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| EPA# 600R99006 | A Lexicon of Cave and Karst Terminology with Special Reference to Environmental Karst Hydrology |
| EPA# 810B94006 | Drinking Water Glossary: A Dictionary of Technical and Legal Terms Related to Drinking Water |
| EPA# 821B00006 | Statistical Support Document for Proposed Effluent Limitations Guidelines and Standards for the Metal Products and Machinery Industry |
| EPA# 175B97001 | Terms of Environment: Glossary Abbreviations and Acronyms (Revised December 1997) |