Surface subsidence engineering
| Prif Awdur: | |
|---|---|
| Awduron Eraill: | , | 
| Fformat: | Llyfr | 
| Iaith: | English | 
| Cyhoeddwyd: | Littleton, Colo.
          Society for Mining, Metallurgy, and Exploration
    
        c1992. | 
| Pynciau: | 
| Prif Awdur: | |
|---|---|
| Awduron Eraill: | , | 
| Fformat: | Llyfr | 
| Iaith: | English | 
| Cyhoeddwyd: | Littleton, Colo.
          Society for Mining, Metallurgy, and Exploration
    
        c1992. | 
| Pynciau: |