2009 습지보호지역 정밀조사 : 담양하천습지·두웅습지 2009 sŭpchi poho chiyǒk chǒngmil chosa - Tamyang hach'ǒn sŭpchi , Tuung sŭpchi - 환경부 국립환경과학원 Hwan'gyǒngbu Kungnip hwan'gyǒng kwahagwŏn (환경부 국립환경과학원 Hwan'gyǒngbu Kungnip hwan'gyǒng kwahagwŏn, 2009)