Ayu SF, Sunny R, Rahmanta. Risk Analysis and Calculation of Insurance Premiums on Coffee Export Activities in North Sumatera Province. Indonesian J. Agric. Res [Internet]. 2020Jul.4 [cited 2024Nov.22];3(2):65 - 76. Available from: https://talenta.usu.ac.id/InJAR/article/view/3968