na INLIS000000000008249 0010-1021003083 Economic analysis of tractor ownership and utilization in South Sulawesi Indonesia Yusuf Maamun Philippines University of The Philippines at Los Banos 1983 xviii, 162 p. ill ; 30 cm + Lamp 631.31 631.31 TRAKTOR ANALISA EKONOMI SULAWESI SELATAN S-2 ECONOMIC ANALYSIS. 7779