Roosmini, D., Rachmatiah, I., Suharyanto, S., Soedomo, A. and Hadisantosa, F. 2014. Biomarker as an Indicator of River Water Quality Degradation. Journal of Engineering and Technological Sciences. 38, 2 (Jan. 2014), 114-122. DOI:https://doi.org/10.5614/itbj.eng.sci.2006.38.2.3.