COnsumer and opinion research, the questionnaire technique
| Autor principal: | |
|---|---|
| Format: | Llibre | 
| Idioma: | English | 
| Publicat: | New York
          Harper
    
        [1943]. | 
| Autor principal: | |
|---|---|
| Format: | Llibre | 
| Idioma: | English | 
| Publicat: | New York
          Harper
    
        [1943]. |