A. Khalifa, Nasradeen ., Adnan Zulkiple, Abdalkrim Gheit Ali Alfughi, Isa Ali Almukhtar attboli, and Abbas Salem Abolbaida Ghammeid. 2019. “Critical Review of Flexible Pavement Maintenance Management Systems”. International Journal of Engineering and Technology 8 (2): 95-101. https://doi.org/10.14419/ijet.v7i4.26957.