ሳይንስ44 ሺሕ መፅሐፍት ለትምህርት ቤቶች ያሰባሰቡ ምሁርTo play this audio please enable JavaScript, and consider upgrading to a web browser that supports HTML5 videoሳይንስTesfalem Waldyes Erago3 ነሐሴ 2009ረቡዕ፣ ነሐሴ 3 2009https://p.dw.com/p/2hxYFማስታወቂያ