Life on Earth a natural history
| Prif Awdur: | |
|---|---|
| Fformat: | Llyfr | 
| Iaith: | English | 
| Cyhoeddwyd: | Boston
          Little, Brown
    
        ©1979. | 
| Rhifyn: | 1st American edition. | 
| Pynciau: | 
| Prif Awdur: | |
|---|---|
| Fformat: | Llyfr | 
| Iaith: | English | 
| Cyhoeddwyd: | Boston
          Little, Brown
    
        ©1979. | 
| Rhifyn: | 1st American edition. | 
| Pynciau: |