Explore Books on
drags (hydrography)

Hydrography

By U.S. Coast and Geodetic Survey.

Hydrography

By Nicholas Hunter Heck

Wire drag manual

By Kenneth S. Ulm

Wire-drag work in Alaska

By Leo O. Colbert

Construction and operation of the wire drag

By J. H. Hawley

Construction and operation of the wire drag and sweep

By J. H. Hawley

Wire-drag work on the Atlantic coast

By N. H. Heck

Description of long wire drag

By N. H. Heck