Salem, R. and bouzebda, naima 2023. Online education as a mechanism to support the learning service in algerian universities during the covid 19 virus -A sample from the department of economics, El Tarf university-: تاريخ الاستلام:10/11/2020 تاريخ القبول:04/05/2023. Human Resources Development Research. 18, 01 (May 2023), 167–186.