Source: https://www.researchgate.net/publication/312480462_Measuring_the_Extent_of_the_Environmental_Pollution_in_the_Waters_of_the_Al-Diwani_River_by_Certain_Trace_Elements_Resulting_from_Al-Diwani_Textile_Factory_Using_Spectroscopic_Methods/fulltext/587e2d0408ae9a860ff517a0/Measuring-the-Extent-of-the-Environmental-Pollution-in-the-Waters-of-the-Al-Diwani-River-by-Certain-Trace-Elements-Resulting-from-Al-Diwani-Textile-Factory-Using-Spectroscopic-Methods.pdf