اﻟﺒﺤﺚ ﻓﻲ اﻟﺪﺭﻭﺱ اﻟﻌﻠﻤﻴﺔ اﻟﺴﻴﺮ اﻟﺨﻄﺐ اﻟـﻤـﺤــﺎﺿـــﺮاﺕ ﺭﻛــﻦ اﻟﻤــﻘــﺎﻻﺕ اﻟﺪﺭﻭﺱ اﻟﻤﻔﺮﻏﺔ اﻟﻤﺮﺋﻴﺎﺕ اﻟﻔﺘﺎﻭﻯ اﻟﺼﻮﺗﻴﺔ