Subsidence due to underground mining(in two parts)

Author:	Br©·auner, Gerhard.
Year:	1973
Document Type:	USBI
Issuing Agency:	U. S. Dept. of the Interior, Bureau of Mines,
Series:	Information circular / United States. Bureau of Mines ;
Report Number:	8571
Subjects:	Subsidences (Earth movements)
	Mine safety
Link:	https://hdl.handle.net/2027/mdp.39015078475640