Potensi Pengembangan Komoditas Unggulan Tanaman Pangan Berdasarkan Analisis Location Quotient (LQ) di Kabupaten Langkat - Hidayat, Shabil; Girsang, M.A.; Tobing, Sarman P.; Khairiah, Khairiah; Haloho, Lermansius; Nainggolan, P. (Proceedings Series on Physical & Formal Sciences, 2021)