Instructions to lightkeepers on first-order triangulation
By: by Carl I. Aslakson, hydrographic and geodetic engineer.
Contributors: Aslakson, Carl I. 1896-
Series: Special publication,; no. 65, 3d <1936> ed.; Special publication (U.S. Coast and Geodetic Survey) ;; no. 65.
Publisher: U.S. Govt. print. off.
Published: 1936
Place of publication: Washington
Language: eng
Number of pages: 26
Subjects: Triangulation.
Notes: At head of title: U.S. Department of commerce. Daniel C. Roper, secretary. Coast and geodetic survey. R.S. Patton, director ...