Béla III, king of Hungary, ruled from 1172 until 1196 AD. He is the youngest son of Etienne III Etienne III. He was a member of the family of Arpad, a family that was able to support the feudal system in Hungary and organized it along the lines of the German and Slavic image. The kingdom expanded at the expense of Croatia, Slovenia and Dalmatia under the leadership of Bela III, and the early feudal state reached its peak in regional expansion and strength.
دراسة بعض المتغيرات المرتبطة في تأخر نمو اللغة لدى أطفال الروضة "دراسة حالة"