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Putri, Elsa Amanda (2025) Simulasi Sistem Dinamis Kualitas Tanah Terhadap Efisiensi Biaya dan Profit Usahatani di Desa Gunungsari. (Dynamic System Simulation of Soil Quality on Cost Efficiency and Farm Profitability in Gunungsari Village). Undergraduate thesis, Universitas 17 Agustus 1945 Surabaya.