Items where Author is "Sinaga, Usman"
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Lumban Gaol, Maju and Noor, Yunizar and Sinaga, Usman and Rosnelli and Panahatan (2008) PENGARUH FREKUENSI GELOMBANG ULTRASONIK TERHADAP POLA PERILAKU GERAK BELALANG KUMBARA SEBAGAI PENGENDALI HAMA PERTANIAN SECARA ELEKTRONIK. Project Report. FT UNIMED, Medan.