Roof-bolting the Delaware Aqueduct

Author:	Platt, D. H.
Year:	1952
Document Type:	USBI
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.27:7652
Series:	Information circular / United States. Bureau of Mines ;
Report Number:	7652
Subjects:	Aqueducts
	Rock bolts
Link:	https://hdl.handle.net/2027/mdp.39015078456632