TYPOLOGIES AND CHARACTERISTICS OF SHEEP FARMING SYSTEMS IN THE COMMUNE OF SFISSIFA, WILAYA OF NÂAMA (WESTERN ALGERIA)Khalil Faradji, Noureddine Slimani, Abdelhakim SenoussiCURRENT TRENDS IN NATURAL SCIENCESVolume 11، (22)، Pages 302-3132022Article Accès ouvert 1