Turkmenistan standards
Original standard AWWA Manual M77 2019 in PDF full version. Additional info + preview on request
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Original standard AWWA Manual M9 2008 Errata 2013 in PDF full version. Additional info + preview on request
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Original standard AWWA Manual M9 2008 Errata 2014 in PDF full version. Additional info + preview on request
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Original standard AWWA Manual M9 2008 in PDF full version. Additional info + preview on request
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Original standard AWWA Math for Wastewater Treatment Operators Grades 3 and 4. 2009 in PDF full version. Additional info + preview on request
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Original standard AWWA Math for Water Treatment Operators. 2007 in PDF full version. Additional info + preview on request
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