CREATION OF A QUESTIONNAIRE ABOUT THE PHYSIOTHERAPY ACTIVITY IN PATIENTS WITH NON-SPECIFIC LOW BACK PAIN (F. González-Grandas & T. Gallego-Izquierdo , Trans.). (2012). Cuestiones De Fisioterapia, 41(1), 42-57. https://cuestionesdefisioterapia.com/index.php/es/article/view/238