Barakat, Ahmed, Rida Khellouk, Widad Ennaji, and Hassan Mosaid. 2022. “Investigation of Heavy Metal Contamination and Ecological and Health Risks in Farmland Soils from Southeastern Phosphate Plateaus of Khouribga (Morocco)”. Ecological Questions 33 (4):61-75. https://doi.org/10.12775/EQ.2022.036.