Yossyafra et al. 2018. A Challenge in Providing Housing Land and Sustainable Agricultural Land; An Effort to Meet The Backlog of Housing and Food Security in West Sumatra. International Journal on Advanced Science, Engineering and Information Technology. 8, 6 (Dec. 2018), 2696–2701. DOI:https://doi.org/10.18517/ijaseit.8.6.7262.