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), pp. 114-122. doi: 10.5614/itbj.eng.sci.2006.38.2.3.