Determination of heavy metals (Pb and Cd) in guava pulps (psidium guajava) obtained in the city of Cartagena. BISTUA [Internet]. 5 de agosto de 2019 [citado 16 de octubre de 2025];17(2):137-43. Disponible en: https://ojs.unipamplona.edu.co/index.php/bistua/article/view/242