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Kartika Dwi Jayanti and Adhona Bhajana Wijaya Negara 2025. ANALISIS KELAYAKAN USAHA PETERNAKAN SAPI DI SAPI PERKASA FARM KECAMATAN HAMPARAN PERAK KABUPATEN DELI SERDANG. Journal of Innovation Research and Knowledge. 5, 3 (Aug. 2025), 3801–3814.