- 
              
            791Principles and applications of mathematics for communications - electronics.Được phát hành 1961Sách
- 
              
            792
- 
              
            793
- 
              
            794Edison experiments you can do based on the original notebooks of Thomas Alva EdisonĐược phát hành 1960Sách
- 
              
            795
- 
              
            796
- 
              
            797
- 
              
            798
- 
              
            799
- 
              
            800