AN ECONOMIC STUDY OF THE IMPACT OF FOOT- MOUTH DISEASE ON THE REPRODUCTION AND PRODUCTION EFFICIENCY OF THE INFECTED MIXED CATTLE IN GHARBIA GOVERNORATE دراسة اقتصادیة لأثر الحمى القلاعیة على الکفاءة التناسلیة والإنتاجیة للأبقار الخلیط المصابة بمحافظة الغربیة
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