Horizontal control data.
Series: Its Special publication,; no. 227; Special publication (U.S. Coast and Geodetic Survey) ;; no. 227.
Publisher: U.S. Govt. print. off.
Published: 1941
Place of publication: Washington
Language: eng
Number of pages: 23
Subjects: Triangulation.; Geodesy -- United States.
Notes: At head of title: U.S. Dept. of commerce, Jesse H. Jones, secretary. Coast and geodetic survey, Leo Otis Colbert, director ...