PURBA, L. R. S.; SITINJAK, W. CONTRIBUTION OF BEEF CATTLE BUSINESS TO THE INCOME OF FARMERS FAMILY IN SIMALUNGUN REGENCY (CASE STUDY: IN SIMALUNGUN DISTRICT). Jurnal Ekonomi, [S. l.], v. 12, n. 02, p. 1377–1384, 2023. Disponível em: https://ejournal.seaninstitute.or.id/index.php/Ekonomi/article/view/1904. Acesso em: 24 jun. 2026.