Magnetic results from Huancayo Observatory, Peru, 1922-1944 /
Carnegie Institution of Washington.Department of Terrestrial Magnetism.
Johnston, Henry Freeborn,1888-
Instituto Geofisico de Huancayo.
Washington, D.C. : Carnegie Institution of Washington,
1948.
Includes bibliographical references.
v. 1. 1922-1935 -- v. 2. 1936-1944.
Geomagnetism