እህሎች ላይ የሚካሄድ ምርምር ጥንቃቄ18 ግንቦት 2007ማክሰኞ፣ ግንቦት 18 2007https://p.dw.com/p/1FWlbማስታወቂያእህሎች ላይ የሚካሄድ ምርምር ጥንቃቄTo play this audio please enable JavaScript, and consider upgrading to a web browser that supports HTML5 audio