题名:
|
Using Sulfur hexafluoride as a gaseous tracer to study ventilation systems in mines / E. D. Thimons et al. , |
ISBN:
|
价格: ¥present |
语种:
|
eng |
载体形态:
|
22 p. |
出版发行:
|
出版地: U. S. 出版社: Department of the Interrior 出版日期: 1974 |
主要责任者:
|
Thimons |
索书号:
|
1 |