A Study of the production and evaluation of training materials for the training of pre-service male teachers in the operation of AV equipment in Saudi Arabia 2026-02-15T16:14:48+03:00 DEBUG: VuFind\ILS\Driver\Folio: Token taken from global cache: eyJhbGciOiJIUzI1NiJ9.eyJzdWIiO... - Hariry, Mohamed Mahdi Ismail Jamal (University of Colorado, 1983)