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Pratama, Desfan Amdrean (2026) Perencanan Kebutuhan Material Kayu Spruce Untuk Memenuhi Permintaan Produk Komponen Piano (Soundboard). (Planning the Material Needs for Spruce Wood to Meet the Demand for Piano Component Products (Soundboard)). Undergraduate thesis, Universitas 17 Agustus 1945 Surabaya.