year of pub­li­ca­ti­onISBNauthor(s)title
2007978-89-7706-204-7Park BumseokWater and Wastewater Professional Engineer problems commentary (Korean edition)
2008978-89-7706-205-4Lee KangwoongConstruction supervision practice Q & A 138 (Korean edition)
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2009978-89-7706-208-5Bae SanggonCivil Construction Professional Engineers, the point (phase) (Korean edition)