National Ground Water Association. (1998). Manual of Water Well Construction Practices (2nd ed.). NGWA Press.
Chicago Style (17. basım) AtıfNational Ground Water Association. Manual of Water Well Construction Practices. 2nd ed. Westerville, OH: NGWA Press, 1998.
MLA (9th ed.) AtıfNational Ground Water Association. Manual of Water Well Construction Practices. 2nd ed. NGWA Press, 1998.
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