Introduction to telephones and telephone systems
| Autor principal: | |
|---|---|
| Format: | Llibre | 
| Idioma: | English | 
| Publicat: | Norwood, Mass.
          Artech House
    
        c1986. | 
| Matèries: | 
| Autor principal: | |
|---|---|
| Format: | Llibre | 
| Idioma: | English | 
| Publicat: | Norwood, Mass.
          Artech House
    
        c1986. | 
| Matèries: |