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Releases med John Giorgi

1 februari 2007 – 1 augusti 2009

Cover for John Giorgi · Wastewater Operator Certification Study Guide (Spiralbok) [Spi edition] (2009)

Wastewater Operator Certificatio... (2009)

Cover for John Giorgi · Math for Wastewater Treatment Operators, Grades 3 & 4: Practice Problems to Prepare for Wastewater Treatment Operator Certification Exams (Pocketbok) (2009)

Math for Wastewater Treatment Op... (2009)

Cover for John Giorgi · Math for Wastewater Treatment Operators Grades 1 & 2: Practice Problems to Prepare for Wastewater Treatment Operator Certification Exams (Pocketbok) (2008)

Math for Wastewater Treatment Op... (2008)

Cover for John Giorgi · Math for Water Treatment Operators: Practice Problems to Prepare for Water Treatment Operator Certification Exams (Pocketbok) [Reprint edition] (2007)

Reprint edition

Math for Water Treatment Operato... (2007)

Cover for John Giorgi · Math for Distribution System Operators: Practice Problems to Prepare for Water Treatment Operator Certification Exams (Pocketbok) (2007)

Math for Distribution System Ope... (2007)