Mohamed Mostafa, A., El-Sayed Sadeq, E., Al Sayed Ismail, A. (2019). 'ANALYSIS OF ECONOMIC EFFICIENCY INDICATORS OF ORGANIC FARMS MANAGEMENT PATTERNS AT FAYOUM GOVERNORATE', Fayoum Journal of Agricultural Research and Development, 33(2), pp. 160-179. doi: 10.21608/fjard.2019.190578