Solihah R, Nurherliyany M, Sandriani S, Putri NI. The Effect of Gym Ball on Reducing Low Back Pain, Labor Pain, and Progress in Primigravida Labor. NURI [Internet]. 2023Mar.30 [cited 2024May6];1(1):30-6. Available from: https://ojs.stikesmucis.ac.id/index.php/nuri/article/view/206