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Ghotb, S. , Chamani, M. , Esmaeili, E. , Foroudi, F.. "Effects of Adding Different Levels of Anaerobic Fungi on Cellulase Activity of Ostrich Digestive Tract-s Microorganisms under in Vitro Condition". World Academy of Science, Engineering and Technology, Open Science Index 59, International Journal of Animal and Veterinary Sciences (2011), 5(11), 667 - 671.