Zahra, A., M. Tayyab, and I. Z. Qureshi. “Histopathological Effects and Element Concentration Of Body Tissues Of Ranid Frog Inhabiting Polluted Water Sites”. European Scientific Journal, ESJ, Vol. 12, no. 8, Mar. 2016, p. 388, doi:10.19044/esj.2016.v12n8p388.