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Widjaja, Selamet (1990) Batching and mixing plant (peralatan penakar dan pengaduk beton). Skripsi thesis, Universitas Tarumanagara.
Widjaja, Selamet (1990) Batching and mixing plant (peralatan penakar dan pengaduk beton). Skripsi thesis, Universitas Tarumanagara.