ዮሃንስ መሐበሪ ምርምር ናይ የሆዋ መሰኻኽር—ሕታም 2019 15:8 ግምቢ ዘብዐኛ (መጽናዕቲ)፡5/2018፡ ገጽ 14፡ 18 ግምቢ ዘብዐኛ፡15/4/2011፡ ገጽ 1815/6/2006፡ ገጽ 18-191/1/2004፡ ገጽ 91/2/2003፡ ገጽ 18-23 ናይ መንግስቲ ኣገልግሎትና፡6/2007፡ ገጽ 1
15:8 ግምቢ ዘብዐኛ (መጽናዕቲ)፡5/2018፡ ገጽ 14፡ 18 ግምቢ ዘብዐኛ፡15/4/2011፡ ገጽ 1815/6/2006፡ ገጽ 18-191/1/2004፡ ገጽ 91/2/2003፡ ገጽ 18-23 ናይ መንግስቲ ኣገልግሎትና፡6/2007፡ ገጽ 1