60

The state of stress in the rocks around a pair of converging workings

Year:
1968
Language:
english
File:
PDF, 217 KB
english, 1968
87

An Estimate of the Risks of the Consumer and Supplier of Energy Carriers

Year:
2004
Language:
english
File:
PDF, 21 KB
english, 2004
99

News of science and technology

Year:
1961
Language:
english
File:
PDF, 326 KB
english, 1961