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 & Technology 8 (2): 95-101. https://doi.org/10.14419/ijet.v7i4.26957.