Tangnga Layuk, R.; Prihatmo, G.; Aditiyarini, D. STUDI KOMPARASI KANDUNGAN TIMBAL PADA KANGKUNG (Ipomea Aquatica Forsk.) DARI PASAR TRADISIONAL DAN SUPERMARKET DI YOGYAKARTA: Comparative Study of Lead Content in Kangkung (Ipomea Aquatica Forsk.) from Traditional Markets and Supermarkets in Yogyakarta. Biospecies 2022, 15, 47-54.