Afifi, M. et al. 2026. DETERMINATION OF LEAD (PB) CONTAMINATION IN LETTUCE (Lactuca sativa L.) FROM VARIOUS COLLECTION SOURCES IN BANDA ACEH, INDONESIA. Jurnal Crystal : Publikasi Penelitian Kimia dan Terapannya. 8, 1 (Mar. 2026), 73–80. DOI:https://doi.org/10.36526/jc.v8i1.7164.