Astuti Y. IMPROVING GRADE 9 SCIENCE PROCESS SKILLS OF SMPN 5 PROBOLINGGO USING DISCOVERY LEARNING MODEL. JPPIPA (Jur. Penelit. Pendidik. IPA) [Internet]. 2019Aug.26 [cited 2024Apr.19];4(1):38-45. Available from: https://journal.unesa.ac.id/index.php/jppipa/article/view/5547