TY - RPRT TI - Water surface contacting cover system--the basic study for improving the oxygen transfer coefficient and the BOD removal capacity. AU - Young Kyu Kim AU - Deog Gwan Ra PY - 2005 DO - 10.1016/j.watres.2004.09.031 UR - https://pubmed.ncbi.nlm.nih.gov/15878027/ ID - 15878027 ER -