Marisa, Julia, and Sukma Aditya Sitepu. “The Role Of Production Factors On Tilapia Farming Business In Toba Samosir District”. Journal of Saintech Transfer 1, no. 2 (April 8, 2019): 181-185. Accessed May 3, 2024. https://talenta.usu.ac.id/jst/article/view/816.