Vol.6, No.2, Jun. 2020
                    
	                        
	                        
	                           
	                               Lemi Aga Duressa,  
	                           
	                               Negash Geleta Ayana 
	                           
	                        
	                        
	                        
	                            Pages: 60-71    Publication Date: Mar. 9, 2020      Views: 2365       Downloads: 1883
	                        
	                     
                    
	                    
	                        
	                        
	                           
	                               Elias Nelly Bapfakurera,  
	                           
	                               Jean Nduwamungu 
	                           
	                        
	                        
	                        
	                            Pages: 72-79    Publication Date: Mar. 18, 2020      Views: 1893       Downloads: 1051
	                        
	                     
                    
	                    
	                        
	                        
	                           
	                               Miao Ding,  
	                           
	                               Yuankang Liu,  
	                           
	                               Jianguo Liu 
	                           
	                        
	                        
	                        
	                            Pages: 80-85    Publication Date: Apr. 14, 2020      Views: 1735       Downloads: 282
	                        
	                     
                    
	                    
	                        
	                        
	                           
	                               Narmina Abel qizi Sadigova,  
	                           
	                               Svetlana Gulu qizi Jafarova,  
	                           
	                               Abdin Shukur oglu Abbasov 
	                           
	                        
	                        
	                        
	                            Pages: 86-90    Publication Date: Apr. 30, 2020      Views: 1753       Downloads: 325
	                        
	                     
                    
	                    
	                        
	                        
	                           
	                               Okafor Ugochukwu Chukwuma,  
	                           
	                               Ezeanochie Philomena Echezonachukwu,  
	                           
	                               Obubu Maxwell 
	                           
	                        
	                        
	                        
	                            Pages: 91-99    Publication Date: May 31, 2020      Views: 1829       Downloads: 601
	                        
	                     
                    
	                    
	                        
	                        
	                           
	                               Milkinesh Tujuba,  
	                           
	                               Negash Geleta Ayana 
	                           
	                        
	                        
	                        
	                            Pages: 100-113    Publication Date: Jun. 10, 2020      Views: 1725       Downloads: 570
	                        
	                     
                    
	                    
	                        
	                        
	                           
	                               John Paull,  
	                           
	                               Benjamin Hennig 
	                           
	                        
	                        
	                        
	                            Pages: 114-119    Publication Date: Jun. 10, 2020      Views: 2699       Downloads: 366