1.
Silaen SE, Ayu SF, Hanafi ND. Beef Cattle Breeder Income Improvement Strategy with Different Maintenance System in Langkat Regency. Rand. Inter. Social Sci. J. [Internet]. 2022Oct.31 [cited 2023Feb.4];3(4):878-90. Available from: http://www.randwickresearch.com/index.php/rissj/article/view/562