Nnoli JN, Onwudinjo FU. Identifying the Process Skills Involved in Teaching Chemistry through the Extraction of Oil from Castor Oil Seed. jcs [Internet]. 2023 Dec. 30 [cited 2025 Sep. 7];3(1):01-6. Available from: https://al-kindipublishers.org/index.php/jcs/article/view/6545