Hydrography.
Subtitle: Construction and operation of the wire drag
Contributors: Hawley, Jean Hodgkins, 1887-
Series: Its  Special publication, no. 56; Special publication (U.S. Coast and Geodetic Survey) -- no. 56
Publisher: Govt. Print. Off.
Published: 1919
Place of publication: Washington
Subjects: Drags (Hydrography)
Other titles: Construction and operation of the wire drag