“Heavy Metals Contamination in Water, Soil and Plant Samples of Okomu National Park, Edo State, Nigeria”, AJBR, ج 23, ش 1, صص 29–34, ژانویه 2020, دسترسی: 5 آوریل 2026. [آنلاین]. قابل دسترس در: https://ojshostng.com/index.php/ajbr/article/view/859