Transactions of madrid meeting, october 1924 / 
International Geodetic and Geophysical Union, Section of Terrestrial Magnetism and Electicity ; edited by Louis A. Bauer 
 - 180 páginas 
 - Bulletin / international geodetic and geophysical union, section of terrestrial manetism and electricity ;  no. 5 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geomagnetismo--Congresos
<br/><br/><label>LC Class. No.: </label>QC811  / I57