Author: HARTNELL (George)

Description

DE P OSITORY HARTNELL (George). Terrestrial magnetism. Horizontal intensity variometers. Washgton, 1922. See UNITED STATES OF AMERICA. Departments of State and Official Bodies. Departniç LComnroe. Coast and Geodetic [Special Publicatiofls.Zf No. 39.

Card ID: 11