A manual on the hydraulic ram for pumping water.
| Prif Awdur: | |
|---|---|
| Fformat: | Llyfr | 
| Iaith: | English | 
| Cyhoeddwyd: | London
          Intermediate Technology
    
        c1982. | 
| Pynciau: | 
| Prif Awdur: | |
|---|---|
| Fformat: | Llyfr | 
| Iaith: | English | 
| Cyhoeddwyd: | London
          Intermediate Technology
    
        c1982. | 
| Pynciau: |