و آر ایل:https://image.slidesharecdn.com/toxicologyprajjuppt-221011102424-4b45f163/85/history-of-ddt-theories-of-ddt-mode-of-action-3-320.jpg?cb=1667563435
و آر ایل:https://www.slideshare.net/PrajwalGowdaMA/history-of-ddt-theories-of-ddt-mode-of-action
