Instructions to light keepers on 1st-order triangulation.

Bibliographic Details
Corporate Author:	U.S. Coast and Geodetic Survey
Format:	Government Document eBook
Language:	English
Published:	[Washington?] : U.S. Government Printing Office, 1926.
Series:	Coast and Geodetic Survey Form No. 4-5 Coast and Geodetic Survey Serial No. 368 Coast and Geodetic Survey Spec. Pub. No. 65 (2nd ed.)
Subjects:	Lighthouses > Maintenance and repair. Electronic books.
Online Access:	Connect to the full text of this electronic document

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