Khaswarina, Shorea, Yeni Kusumawaty, and Eliza Eliza. “Analisis Saluran Pemasaran Dan Marjin Pemasaran Bahan Olahan Karet Rakyat (Bokar) Di Kabupaten Kampar”. Unri Conference Series: Agriculture and Food Security 1 (January 30, 2019): 88-97. Accessed December 7, 2022. http://conference.unri.ac.id/index.php/unricsagr/article/view/a12.