Analisis manfaat biaya lingkungan usaha ternak babi: Stud! Kasus di desa Ambarketawang Kcamatan Gmping Kabupa ten Sleman (Benefit Cost Analysis of Pig Farming Environment: Case Study at Ambarketawang illage, Gamping .. - Perpustakaan UGM, i-lib ([Yogyakarta] : Universitas Gadjah Mada, 2001)