Principles of sociology with educational applications
| Prif Awdur: | |
|---|---|
| Fformat: | Llyfr | 
| Iaith: | English | 
| Cyhoeddwyd: | New York
          Macmillan
    
        1920. | 
| Cyfres: | Brief course series in education [ed. by P. Monroe] | 
| Pynciau: |