“Using of 4-Chlororesorcinol As a Coupling Agent in Spectrophotometric Determination of Benzocaine”. Rafidain Journal of Science 30, no. 3 (September 1, 2021): 1–11. Accessed June 27, 2026. https://rsci.uomosul.edu.iq/index.php/rsci/article/view/46355.