Instructions for the compensation of the magnetic compass
By: by N. H. Heck, chief, Division of Terrestrial Magnetism and Seismology.
Contributors: Heck, N. H. 1882-1953.
Series: Special publication,; no. 96  1938 ed.
Publisher: U.S. Govt. Print. Off.
Published: 1938
Place of publication: Washington
Language: eng
Number of pages: 49
Subjects: Compass
Notes: At head of title: U.S. Department of Commerce. Daniel C. Roper, secretary. Coast and Geodetic Survey. Leo Otis Colbert, director.