Ismahane Haridi, Messaoud Aiche, Abdeldjalil Hamdaoui, Ahmed Mounir Ansar. THE USE OF DIRECT OBSERVATION TO EVALUATE THE DEGREE OF VISUAL COMFORT IN THE LIBRARY OF GUELMA UNIVERSITY. IJITSS [Internet]. 2025Jan.16 [cited 2025Aug.1];(4(44). Available from: https://rsglobal.pl/index.php/ijitss/article/view/3089