فهرس المقالات Helen Hedeshian المقاله 1 - Evaluating the Extent to which Public Relations of Private Organizations Employ Social Networks to Introduce Products and Services 20.1001.1.23222301.2023.9.3.11.4 10.30495/jsm.2023.1977540.1746 Alireza Biabannavard Sarvestani Helen Hedeshian Journal of System Management , العدد 4 , السنة 9 , تابستان 2023