Economics of new sand and gravel developments

Author:	Thoenen, John Roy,
Year:	1929
Document Type:	BMEP
Issuing Agency:	U.S. Govt. Print. Off.,
SUDOC:	I 28.38:7
Series:	U.S. Bureau of Mines. Economic paper ;
Report Number:	7
Subjects:	Gravel
	Sand
Link:	https://hdl.handle.net/2027/mdp.39015077573734