Radio operating questions and answers
| Autor principal: | |
|---|---|
| Format: | Llibre | 
| Idioma: | English | 
| Publicat: | New York
          McGraw-Hill
    
        c1952. | 
| Edició: | 11th ed. | 
| Autor principal: | |
|---|---|
| Format: | Llibre | 
| Idioma: | English | 
| Publicat: | New York
          McGraw-Hill
    
        c1952. | 
| Edició: | 11th ed. |