THE SUSTANABLE MARKETING IMMUNITY OF TOURIST OF BUSINESS IN LIGHT OF THE PANDEMIC-CORONA (COVID-19) AN APPLIED RESEARCH IN TRAVEL AND TOURISM COMPANIES IN BAGHDAD: THE SUSTANABLE MARKETING IMMUNITY OF TOURIST OF BUSINESS IN LIGHT OF THE PANDEMIC-CORONA (COVID-19) AN APPLIED RESEARCH IN TRAVEL AND TOURISM COMPANIES IN BAGHDAD. IJMRCP. 2021;13(2):173-191. Accessed May 3, 2024. https://jmracpc.uobaghdad.edu.iq/index.php/IJMRCP/article/view/261