YASID, HAMDAN. ANALISIS USAHATANI DAN PENDAPATAN USAHATANI SEMANGKA DI KECAMATAN KAMPAR KABUPATEN KAMPAR RIAU. Jurnal Ilmiah Pertanian, [S. l.], v. 1, n. 2, p. 15–26, 2005. DOI: 10.31849/jip.v1i2.1354. Disponível em: http://journal.unilak.ac.id/index.php/jip/article/view/1354. Acesso em: 3 jul. 2026.