ቴድሮስ ገብሬብርክታዊት ተከላይ2019-03-132023-11-092019-03-132023-11-092007http://etd.aau.edu.et/handle/123456789/16753Amharicየአማርኛ የሳይንስ ልቦለድ ሙከረወችThesis