Korea Ocean Research and Development Institute, Marine Resources Research Div., Korea Ocean Research & Development Institute, Ansan, 426-744, Korea, Republic of
Seoul National University, Department of Earth science education, Seoul National University, Seoul, 151-742, Korea, Republic of
Gyeongin National University of Education, Department of Science education, Gyeongin National University of Education, Anyang, 430-739, Korea, Republic of
Seoul National University, Department of Earth science education, Seoul National University, Seoul, 151-742, Korea, Republic of
Korea Ocean Research and Development Institute, Marine Resources Research Div., Korea Ocean Research & Development Institute, Ansan, 426-744, Korea, Republic of
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Korea Ocean Research and Development Institute, Marine Resources Research Div., Korea Ocean Research & Development Institute, Ansan, 426-744, Korea, Republic of