“?DETERMINATION OF TRACE ELEMENTS IN BARLEY, BEET AND PURSLANE OF KALABSHA AREA OF ASWAN IN EGYPT”. Biological Sciences - PJSIR 38, no. 11-12 (December 18, 1995): 410–413. Accessed March 10, 2026. https://www.v2.pjsir.org/index.php/biological-sciences/article/view/2535.