Helmayuni and Mardianto 2021. Economic Valuation of “Parak” Traditional Agroforestry West Sumatera (Case Study in Nagari Paninggahan, Solok Regency). INFLUENCE: INTERNATIONAL JOURNAL OF SCIENCE REVIEW. 3, 3 (Dec. 2021), 34–42. DOI:https://doi.org/10.54783/influencejournal.v3i3.271.