EFFICIENCY MEASUREMENT IN THE AGRICULTURAL SALES COOPERATIVE UNIONS VIA DEA: A CASE STUDY IN MARMARABİRLİK. Üçüncü Sektör Sosyal Ekonomi Dergisi 2017, 52 (ÖZELSAYI), 627-641. https://doi.org/10.15659/3.sektor-sosyal-ekonomi.17.12.835.