COMPARISON OF ANALGESIC EFFICACY FOR LABOR PAIN MANAGEMENT BETWEEN EPIDURAL BUPIVACAINE 0.0625% AND BUPIVACAINE 0.1% BOTH COMBINED WITH 1 MCG/ML FENTANYL. (2026). Vietnam Journal of Community Medicine, 67(9). https://doi.org/10.52163/yhc.v67i9.6623