Selected aspects of intermediate technology.
| Prif Awdur: | |
|---|---|
| Fformat: | Llyfr | 
| Iaith: | English | 
| Cyhoeddwyd: | Georgia
          Georgia Institute of Technology
    
        1976. | 
| Cyfres: | Pictorial monographp no.1 | 
| Pynciau: | 
| Prif Awdur: | |
|---|---|
| Fformat: | Llyfr | 
| Iaith: | English | 
| Cyhoeddwyd: | Georgia
          Georgia Institute of Technology
    
        1976. | 
| Cyfres: | Pictorial monographp no.1 | 
| Pynciau: |