Scientific Advertising
    
    
        By:
        












    





    





    
        
            
            
                
            
        
        Claude C. Hopkins
    
    


    
    
        Narrated by:
        












    





    





    
        
            
            
                
            
        
        Paul Jones
    
    


    
    Length: 2 hrs and 4 mins
    49 ratings
    Overall 4.4