Dadan Prayogo, Bernadus Sadu, Utomo Wicaksono, Fitri Gunawati. ADDITION OF DEEP CROSS-FRICTION MASSAGE IS BETTER THAN SLOW STROKE BACK MASSAGE AFTER MCKENZIE EXERCISE TO IMPROVE FUNCTIONAL ABILITY AND WORK PRODUCTIVITY OF STONE BREAKERS WITH NON-SPECIFIC LOW BACK PAIN . IJSS [Internet]. 2022 Aug. 3 [cited 2025 Jul. 4];2(2):1483-90. Available from: https://bajangjournal.com/index.php/IJSS/article/view/3080