Sand and Gravel Excavation: Part 3: Hydraulic Dredge, Clamshell Dredge, Ladder Dredge, and Dipper Dredge

Author:	Thoenen, J. R.
Year:	1935
Document Type:	N/A
SUDOC:	I 28.27:6826
Series:	Information circular (United States. Bureau of Mines)
Report Number:	I. C. 6826
Subjects:	Sand.
	Excavating machinery.
	Dredges.
	Gravel.
Link:	http://digital.library.unt.edu/ark:/67531/metadc67010/