Marfi Ario. APPLICATION OF LESSON STUDY IN THE CALCULUS I LECTURE IN THE MATHEMATIC EDUCATION STUDY PROGRAM. JA [Internet]. 2020 Aug. 11 [cited 2025 May 17];6(2):112-2. Available from: https://www.publikasi.stkippgri-bkl.ac.id/index.php/APM/article/view/205