1. Saadi, Hussein Ali, Water Environment. Al Yazouri Publishing House, Jordan(2006).
2. Sarkar, A. Ravindran,G.and Krishna murthy,V., A brief review on the effect of cadmium toxicity:from cellular to organ level International Journal of Bio-Technology and Research (IJBTR).3(1):17–36(2013).
3. Al-Saadawi, Raham Hussein Ahmed Ali, Treatment of soil contaminated with some heavy elements using the vegetarian spousal Mathiola incana and petunia intergrifolia Petunia, Master's thesis, Faculty of Science, Tikrit University (2015).
4. Abdel Moneim, Essam Mohammed and Turki, Ahmed Bin Ibrahim, Heavy elements sources and damage to the environment, the center of promising research in biocontrol and agricultural information, Qassim, Dar al-Books for printing and publishing (2012).
5. Athar, R. and Ahmad, M., Heavy Metal Toxicity: Effect on PlantGrowth and Metal Uptake by Wheat, and on Free Living Azotobacter. water Air pollution. v.138.N.1-4.P:165–180, (2010).